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Trezor firmware

Firmware monorepo for Trezor One, Model T, and Safe devices.

BitcoinHardware walletsNormal
Repository coverage

2655 commits in the local evidence base

Every captured commit receives deterministic security triage and a separate communication-quality score. Security candidates and broader second-pass signals receive full-patch Ollama analysis.

916security candidates311second-pass queue1049AI analyses
343commits · 30 days
582commits · 60 days
1357commits · 180 days
2654commits · 365 days
Backfill bands
Aug 5 → Feb 61298 seen115 candidatesComplete
Feb 6 → Jun 6775 seen58 candidatesComplete
Jun 6 → Jul 6217 seen13 candidatesComplete
Jul 6 → Aug 5360 seen54 candidatesComplete
Commit communication

Does the history explain itself?

Message quality measures whether a commit identifies its scope, purpose, rationale, testing, and supporting references. It does not change the security-severity score.

66/100 average clarity
473Strong · 80–100
1318Adequate · 60–79
859Thin · 40–59
5Opaque · 0–39
Read the scoring rubric →
Developer activity

Who is changing the project?

Public Git author strings; identities are not independently verified.

DeveloperCommitsCandidatesAnalyzedHigh riskMessage avg.
Andrew Kozlik702427266
Roman Zeyde571177209171
tychovrahe292104109161
PrisionMike945975173
Jakub Janků19915184
Martin Pastyřík2389173
cepetr1968282059
Ioan Bizău23076117059
obrusvit2137685064
M1nd3r2067177071
Lukas Bielesch846767067
Martin Milata1744646063
Analysis record

Published AI watches

Last scanned 0 minutes ago

Informational 18 AI analysisMessage 57 · Thin
TZ TrezorTrezor firmware BitcoinHardware wallets

chore(core): remove sha1 from regular FW

This commit removes the SHA-1 hashing function from the regular Trezor firmware. SHA-1 is an old, weak hash algorithm that is no longer considered secure for sensitive uses. The change deletes the code that exposes SHA-1 to apps running on…

Removal of a deprecated cryptographic primitive (SHA-1) from the firmware API surfaceReduction of attack surface and prevention of future misuse of a collision-vulnerable hashNo direct vulnerability patch or memory-safety bug is present in the diff
16d15774by M1nd3r+0−2006 files
No security note in commit
Low 27 AI analysisMessage 62 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(crypto): pass static public key to `noise_xxpsk3_*_init()`

This commit changes how a cryptographic library sets up secure connections. Previously, the code automatically calculated the public key from the private key. Now, the caller must provide the public key directly. This is a code-quality ref…

Cryptographic key handling changed: public key is now supplied rather than derivedPotential reduction of key-mismatch risk if caller provides correct public keyNew null-pointer check added for static_public_key
1b3128a4by Ondřej Vejpustek+20−92 files
No security note in commit
Informational 15 AI analysisMessage 57 · Thin
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(crypto): change order of parameters

This commit simply reorders the arguments of an internal function called dh() and updates every place that calls it. The actual math and security behavior are unchanged; it is a code cleanup with no security effect.

33a119eeby Ondřej Vejpustek+15−151 file
No security note in commit
Informational 15 AI analysisMessage 47 · Thin
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(crypto): prefix enums

This commit simply renames two groups of internal status labels (called enums) in the Trezor firmware's cryptographic code. The old names like WAITING_FOR_REQUEST1 were shared between two different parts of the code, so the developer gave …

f1c74046by Ondřej Vejpustek+26−222 files
No security note in commit
Low 37 AI analysisMessage 57 · Thin
TZ TrezorTrezor firmware BitcoinHardware wallets

fix(crypto): prevent calling `memzero(NULL, ...)`

This commit fixes three places in the Trezor firmware's cryptographic code where a memory-clearing function could be called with a NULL pointer. In practice, passing NULL to memzero is harmless on Trezor's platform (it does nothing), but i…

NULL pointer passed to memory-zeroing helper in cryptographic codeUndefined behavior in C standard library contractDefensive hardening in Noise protocol implementation
0394e934by Ondřej Vejpustek+11−51 file
No security note in commit
Informational 18 AI analysisMessage 62 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(crypto): return remote static key from `noise_xxpsk3_*_handle_*()`

This commit is a code cleanup (refactor) for the cryptographic handshake code used in Trezor devices. It changes how the other party's long-term public key is returned to the caller: instead of storing it inside an internal state structure…

Removal of long-term public key storage from internal handshake stateCaller-supplied output buffer for remote static public key reduces internal secret retentionError-path memzero of returned key material on failure
3ead1aa6by Ondřej Vejpustek+79−423 files
No security note in commit
Informational 17 AI analysisMessage 57 · Thin
TZ TrezorTrezor firmware BitcoinHardware wallets

feat(xtask): introduce project-toml build-options

This commit is a build-system refactoring for Trezor firmware. It moves the mapping of command-line build options to Rust/cargo features out of hard-coded Rust logic and into per-project TOML files. It also adds a small change so debug bui…

Build-option mapping now lives in project.toml files, increasing the attack surface for supply-chain/build-configuration tamperingMakefile change automatically enables debug-link for PYOPT=0 debug buildsValidation added to reject storage_insecure_testing_mode in production builds
d44de007by cepetr+681−40817 files
No security note in commit
Informational 15 AI analysisMessage 67 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

test(ethereum): fix incorrect address checksum

This commit only updates test data. It corrects the capitalization (checksum) of Ethereum addresses used in automated tests and refreshes the expected screen-shot hashes those tests compare against. There are no changes to the actual Trezo…

2b1938ccby Tomas Martykan+52−523 files
No security note in commit
Low 33 AI analysisMessage 67 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

fix(python/trezorlib): enable entropy check on T1 by default

This commit changes the Trezor Python library so that, when setting up a Trezor Model One (the original Trezor 1 device), it now performs an entropy check by default if the device runs firmware 1.13.1 or newer. Previously, the library only…

Enables a previously disabled security/validation feature (entropy check) for a specific device modelAdds version-gated behavior to avoid errors on older firmwareDefensive hardening of wallet setup randomness verification
a4af9107by Andrew Kozlik+10−42 files
No security note in commit
Informational 15 AI analysisMessage 57 · Thin
TZ TrezorTrezor firmware BitcoinHardware wallets

chore(core): remove scons related files

This commit is a routine cleanup that removes the old SCons build system files from the Trezor Core firmware repository. It deletes Makefiles, SConscripts, and related Python helper scripts, but does not change any firmware source code, cr…

a4b25c31by cepetr+5−927554 files
No security note in commit
Informational 22 AI analysisMessage 80 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(core): assorted micropython-1.28.0 fixes

This commit updates Trezor's embedded MicroPython interpreter from an older version to 1.28.0. It pulls in several upstream MicroPython bug fixes, including stricter buffer-size checks for converting integers to bytes, a new stack-safety A…

Synchronizes upstream MicroPython fixes that include buffer-size and stack-safety hardeningPrevents Ctrl+C interruption of frozen boot code, reducing denial-of-service/control-flow risk during bootFixes sys.stdout.buffer.write() return value, which could affect code relying on correct I/O semantics
7ba7879dby Martin Milata+36−4012 files
No security note in commit
Informational 15 AI analysisMessage 70 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(core): use mp_obj_new_str_from_cstr

This commit is a simple code cleanup that replaces a common MicroPython string-creation pattern with a new helper function. It does not change what the code does, only how it is written. There is no security issue visible in the change.

6a889e6aby Martin Milata+3−33 files
No security note in commit
Informational 15 AI analysisMessage 80 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(core): replace hexlify with bytes.hex()

This is a large but straightforward internal cleanup: the project switched from using the MicroPython `ubinascii` module's `hexlify`/`unhexlify` functions to the standard Python `bytes.hex()` and `bytes.fromhex()` methods. The change remov…

44aa469eby Martin Milata+1334−1383120 files
No security note in commit
Informational 18 AI analysisMessage 70 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(core): replace m_new_obj_with_finaliser

This commit is a routine code cleanup in the Trezor firmware's embedded MicroPython modules. It replaces an older, two-step object allocation pattern with a newer helper that allocates memory and sets the object type in one step. The chang…

No security-relevant logic changes observedNo input validation changesNo memory safety bug fixes (e.g., no overflow, use-after-free, or uninitialized memory fixes)
142794eaby Martin Milata+40−5619 files
No security note in commit
Informational 15 AI analysisMessage 80 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(core): bundle the utimeq module

This commit is a routine maintenance refactor. MicroPython removed its built-in 'utimeq' module, so Trezor copied the same code into its own firmware tree and renamed it to 'timeq'. There is no security bug being fixed and no new vulnerabi…

617bc806by Martin Milata+284−2211 files
No security note in commit
Informational 17 AI analysisMessage 70 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(core): use mp_obj_new_str_from_vstr

This is a code cleanup change in Trezor's firmware that swaps one MicroPython internal helper for another. It replaces calls that create byte or string objects from a vstr buffer with newer, purpose-built helpers. The commit message says t…

Refactor only: helper function renames with equivalent semanticsNew str helper adds UTF-8 validation; bytes helper does not validateNo input validation, length, or error-handling changes observed
7ea11191by Martin Milata+72−7433 files
No security note in commit
Informational 15 AI analysisMessage 85 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(core): switch to slots-based mp_obj_type_t

This commit is a routine internal cleanup that switches how Trezor's firmware defines built-in MicroPython object types. It replaces older, manually-written type structures with a newer macro provided by the upstream MicroPython project. T…

ab51798fby Martin Milata+163−16624 files
No security note in commit
Informational 15 AI analysisMessage 62 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(core/rust): bindgen wrapper for calling static micropython functions

This commit is a straightforward internal code refactor. It adds a small C wrapper file so that Rust code can call two specific internal MicroPython functions that are declared as static/inline in headers. There is no user-facing change, n…

d5121d92by Martin Milata+20−06 files
No security note in commit
Informational 15 AI analysisMessage 80 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

build(core): adjust mpy-cross paths

This commit is a routine build-system update for the Trezor firmware. It changes where the build process looks for the MicroPython cross-compiler binary (mpy-cross) and synchronizes a configuration header with newer MicroPython code. There…

2ef70e16by Martin Milata+18−264 files
No security note in commit
Low 30 AI analysisMessage 80 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

build(core): collect micropython GC root pointers

This commit updates the Trezor firmware build system to use a newer MicroPython mechanism for tracking special memory pointers called 'root pointers.' It removes hard-coded lists of these pointers from configuration files and instead colle…

GC root pointer handling changedBuild system now auto-collects root pointers instead of hard-coding themRemoves manual MICROPY_PORT_ROOT_POINTERS lists
fc128f3dby Martin Milata+75−107 files
No security note in commit
Repository ledger

Explore captured commits

Expand any commit for its author, full message, clarity score, changed files, triage signals, analysis, and source link.

Security candidatechore(core): fail earlier if the device is not initializedby Roman Zeyde · 560a071c · Jun 1, 2026 · 1 fileMessage 62 · AdequateLow 35Details
Commit message · Roman Zeyde

chore(core): fail earlier if the device is not initialized

[no changelog]

62/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
Why it was queued
seed or entropy path
AI analysis · Low 35/100

This commit moves a safety check earlier in the process of setting up a cryptographic seed on a Trezor device. The check ensures the device is properly initialized before it proceeds. By running the check earlier, it prevents a situation where a seed might already be cached or a passphrase accepted before the initialization check happens. This is a defensive hardening change, not a confirmed exploitable vulnerability, because the commit message does not describe a security issue and no exploit path is shown in the diff.

Security candidaterefactor(core/delizia): rename `Frame::new()` to `Frame::with_header()`by Roman Zeyde · ba3b6490 · May 29, 2026 · 21 filesMessage 77 · AdequateInformational 15Details
Commit message · Roman Zeyde

refactor(core/delizia): rename `Frame::new()` to `Frame::with_header()`

Will be used in the following commit.

[no changelog]

77/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides an explanatory body
Why it was queued
boot or update pathauthentication path
AI analysis · Informational 15/100

This commit is a simple code cleanup: it renames a Rust function from Frame::new() to Frame::with_header() and updates every place that called it. There is no change to what the code does, no bug fix, and no security-relevant behavior.

Security candidatechore(core/delizia): drop header if `show_warning()` title is emptyby Roman Zeyde · a6090dce · May 29, 2026 · 2 filesMessage 62 · AdequateInformational 17Details
Commit message · Roman Zeyde

chore(core/delizia): drop header if `show_warning()` title is empty

Similar to af8bfeb308.

[no changelog]

62/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
Why it was queued
boot or update path
AI analysis · Informational 17/100

This is a small user-interface cleanup change for the Trezor hardware wallet's Delizia layout. It makes warning screens hide their top title bar when the title is empty, and explicitly rejects 'danger' warnings that have no title. There is no direct evidence this fixes a security vulnerability; it appears to be a UI consistency improvement.

Security candidaterefactor(core/delizia): use `u8` for header marginby Roman Zeyde · 3c8efa1f · May 29, 2026 · 3 filesMessage 62 · AdequateInformational 15Details
Commit message · Roman Zeyde

refactor(core/delizia): use `u8` for header margin

[no changelog]

62/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
Why it was queued
boot or update path
AI analysis · Informational 15/100

This is a small internal code cleanup in the Trezor firmware's user-interface code. It changes a variable used for screen layout margin from a larger integer type (`usize`) to a smaller one (`u8`). The actual behavior is unchanged because the value is immediately converted to the same screen-coordinate type (`i16`) used before. There is no security-relevant change visible in the commit.

Security candidaterefactor(core): update t2t1 firmware layout for rlib linkingby cepetr · 4844171d · May 29, 2026 · 1 fileMessage 62 · AdequateInformational 17Details
Commit message · cepetr

refactor(core): update t2t1 firmware layout for rlib linking

[no changelog]

62/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
Why it was queued
boot or update path
AI analysis · Informational 17/100

This commit rearranges how different pieces of the Trezor firmware are placed in the device's flash memory. It moves frozen Python data and the main code sections into one flash region, while moving the bootloader into a separate flash region. The stated purpose is to support linking Rust static libraries (rlib). There is no direct evidence in the commit that this fixes a security vulnerability.

Security candidatefix(core): remove unused ipc syscallsby cepetr · eae18bd2 · May 29, 2026 · 3 filesMessage 57 · ThinInformational 12Details
Commit message · cepetr

fix(core): remove unused ipc syscalls

[no changelog]

57/100 · ThinMessage clarity
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
Why it was queued
boot or update path
AI analysis · Informational 12/100

This commit removes the 'ipc' feature flag from three build scripts by default, and only enables it when external app loading is supported on the T3W1 model. IPC stands for inter-process communication, and these particular system calls were reportedly unused. There is no direct evidence in the commit that this fixes an active security vulnerability; it appears to be a cleanup or hardening change to reduce unused attack surface.

Security candidatefeat(core): use Cargo as the build system for C codeby cepetr · 8e2ff473 · May 29, 2026 · 176 filesMessage 62 · AdequateInformational 17Details
Commit message · cepetr

feat(core): use Cargo as the build system for C code

[no changelog]

62/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
Why it was queued
cryptography-sensitive pathseed or entropy pathboot or update pathparser or protocol path
AI analysis · Informational 17/100

This is a massive Trezor firmware commit that replaces the old SCons-based build system with Cargo (Rust's build tool) for compiling the embedded C code. It adds many new Cargo.toml files, build.rs scripts, and a custom xbuild helper crate, but does not change the actual security logic of the wallet. The main risk is that a build-system change of this size could accidentally alter compiler flags, included source files, or linker settings, which might affect the produced binary. There is no direct vulnerability shown in the diff, and the commit message explicitly says it is a feature with no changelog entry.

Security candidatechore(python): chunkify printed fingerprints of fw-imagesby M1nd3r · 4b92414f · May 29, 2026 · 1 fileMessage 85 · StrongInformational 15Details
Commit message · M1nd3r

chore(python): chunkify printed fingerprints of fw-images

- Chunkifies fingerprints of fw-images, secmon, bootloader...
- Makes visual comparison of expected and actual fingerprints easier.

[no changelog]

85/100 · StrongMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides detailed explanatory context
Why it was queued
update trustboot or update path
AI analysis · Informational 15/100

This commit only changes how long hexadecimal fingerprints and hashes are displayed to users. It inserts spaces every four characters so the strings are easier to read and compare visually. There is no change to security logic, cryptography, or how firmware is verified.

Security candidatechore(docs): fix and improve doc-linksby M1nd3r · 92a46a45 · May 29, 2026 · 8 filesMessage 80 · StrongInformational 15Details
Commit message · M1nd3r

chore(docs): fix and improve doc-links

- Fixed broken links to non-existent places.
- Replaced doc links to github by relative links to the md files. This allows to use `docs.trezor.io` without being needlessly transported to the github version of the linked doc page.
- Replaced "links to symlinks" by" links to the original files". Symlinks do not work nicely on github - user must manually find the symlinked doc page.

[no changelog]

80/100 · StrongMessage clarity
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides detailed explanatory context
Why it was queued
boot or update pathdocumentation-only discount
AI analysis · Informational 15/100

This commit only updates documentation links inside the Trezor firmware repository. It fixes broken links, replaces GitHub URLs with relative links, and removes a symlinked documentation file. There are no code changes and no security impact.

Security candidatechore(python): add sanity check to `Struct`'s parsingby M1nd3r · 5bf62138 · May 27, 2026 · 8 filesMessage 62 · AdequateLow 35Details
Commit message · M1nd3r

chore(python): add sanity check to `Struct`'s parsing

[no changelog]

62/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
Why it was queued
boot or update path
AI analysis · Low 35/100

This commit adds a new optional sanity-check layer to the Python code that parses Trezor firmware files. It verifies that re-encoding a parsed firmware image produces the exact same bytes, and that any 'reserved' fields are all zeroes. The change is defensive: it can help detect malformed or tampered firmware images during analysis, but the strict mode is off by default, so existing behavior is preserved unless a caller explicitly opts in.

Security candidaterefactor(core/delizia): remove `Header`-related helpers from `Frame`by Roman Zeyde · 9c42d459 · May 27, 2026 · 22 filesMessage 62 · AdequateInformational 15Details
Commit message · Roman Zeyde

refactor(core/delizia): remove `Header`-related helpers from `Frame`

[no changelog]

62/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
Why it was queued
boot or update pathauthentication path
AI analysis · Informational 15/100

This commit is a straightforward internal code cleanup in the Trezor firmware's user interface code. It moves header-related helper methods (like title alignment, cancel/menu buttons, and styling) from the Frame component to the Header component. All existing call sites are updated to build a Header first and then pass it into a Frame. There is no change to user-visible behavior or security logic.

Security candidatefeat(solana): add off-chain message signingby Jakub Janků · 1d52d583 · May 26, 2026 · 26 filesMessage 88 · StrongLow 36Details
Commit message · Jakub Janků

feat(solana): add off-chain message signing

Implements the Solana off-chain message signing standard v0
as specified here:

https://docs.anza.xyz/proposals/off-chain-message-signing

The implementation deviates from the spec in the supported
message formats --- the spec says that HW wallets should clear-
sign format 0 (ascii), blind-sign format 1 (short utf-8), and
not support format 2 (long utf-8) messages. We try to clear-sign
messages irrespective of the format. The rationale is that we
__can__ display even longer messages incl. some non-ascii chars
and thus the limitation is arbitrary. Moreover, this restriction
is removed in the newer v1 spec, see:

https://github.com/solana-foundation/SRFCs/discussions/3

Closes: https://github.com/trezor/trezor-firmware/issues/6759

88/100 · StrongMessage clarity
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides detailed explanatory context✓ Links an issue, advisory, or supporting reference
Why it was queued
signing boundarysigning or wallet path
AI analysis · Low 36/100

This commit adds a new Trezor feature: signing and verifying Solana off-chain messages. It is a feature implementation, not a fix for a known vulnerability. The code introduces new message types, parsing logic, user confirmation screens, and client helpers. There is no direct evidence in the commit of a security bug, but any new signing path increases the attack surface and must be reviewed carefully for parsing mistakes or user-interface spoofing.

Security candidatefix(solana): support multisig transfer instructionby Jakub Janků · ad2a4443 · May 26, 2026 · 6 filesMessage 100 · StrongLow 37Details
Commit message · Jakub Janků

fix(solana): support multisig transfer instruction

The test vector is based on the trezorctl command in the GH issue.
The signing account was changed to 14CCvQzQzHCVgZM3j9soPnXuJXh1RmCfwLVUcdfbZVBS
(address derived from m/44'/501'/0'/0').

Closes: https://github.com/trezor/trezor-firmware/issues/6843

100/100 · StrongMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides detailed explanatory context✓ Mentions testing or verification✓ Links an issue, advisory, or supporting reference
Why it was queued
signing boundaryfuzzing or regression evidencesigning or wallet path
AI analysis · Low 37/100

This commit updates the Trezor firmware's Solana support so that the standard 'Transfer' instruction can be used with multi-signature accounts. Previously, the firmware treated this instruction as non-multisig, which likely caused it to reject or mis-handle legitimate Solana transactions that required multiple signers. The change is a feature/fix to broaden supported transaction shapes, not a patch for an active vulnerability.

Security candidatechore(core/eckhart): regulatory updateby obrusvit · 2ad1502c · May 26, 2026 · 11 filesMessage 72 · AdequateInformational 15Details
Commit message · obrusvit

chore(core/eckhart): regulatory update

- Brasil
- Ghana
- Nigeria

[no changelog]

72/100 · AdequateMessage clarity
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides an explanatory body
Why it was queued
boot or update path
AI analysis · Informational 15/100

This commit adds new regulatory certification screens for Brazil, Ghana, and Nigeria to the Trezor hardware wallet's user interface. It is purely a compliance/labeling change: new image files are included and a list of regulatory regions is updated. There is no indication of any security bug, vulnerability, or behavior change affecting funds or device security.

Security candidatechore(python): minor adjustments to trezorlib/firmwareby M1nd3r · 6124c57b · May 25, 2026 · 2 filesMessage 62 · AdequateInformational 15Details
Commit message · M1nd3r

chore(python): minor adjustments to trezorlib/firmware

[no changelog]

62/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
Why it was queued
boot or update path
AI analysis · Informational 15/100

This is a routine Python code change in Trezor's firmware handling library. It adds support for a new Nordic (NRF) firmware header type and helper methods to insert cryptographic signatures into firmware image structures, plus a minor formatting tweak. There is no indication of a security vulnerability or fix.

Security candidatechore(trezorlib): fix `BootloaderV2Image` handling in `firmware_headers.py`by M1nd3r · ac308d2e · May 25, 2026 · 1 fileMessage 62 · AdequateLow 32Details
Commit message · M1nd3r

chore(trezorlib): fix `BootloaderV2Image` handling in `firmware_headers.py`

[no changelog]

62/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
Why it was queued
update trustboot or update path
AI analysis · Low 32/100

This commit fixes how Trezor's Python library validates signatures for a new bootloader image format (BootloaderV2). Before the fix, the code ignored the signature bitmask and simply checked every signature against every public key in order. This could let an invalid or mismatched signature slip through, or cause validation to fail incorrectly. The patch makes the library read the bitmask, count signatures correctly, and only verify the signatures the image actually claims to have signed with. It also adds a missing signature-status line to the printed header. The change is in developer/CLI tooling, not the device firmware itself, so a direct attack on a real device is unlikely, but the library is used to inspect and validate firmware files.

Security candidatechore(core/eckhart): drop warning header if title is emptyby Roman Zeyde · af8bfeb3 · May 25, 2026 · 1 fileMessage 62 · AdequateInformational 15Details
Commit message · Roman Zeyde

chore(core/eckhart): drop warning header if title is empty

[no changelog]

62/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
Why it was queued
boot or update path
AI analysis · Informational 15/100

This is a minor user-interface cleanup for the Trezor hardware wallet's Eckhart layout. It removes the warning header from a screen when the title text is empty, so users don't see a blank header. There is no security-relevant change.

Security candidatechore(core): send MCU attestation only when streaming is supportedby Roman Zeyde · cefdddc6 · May 25, 2026 · 2 filesMessage 62 · AdequateLow 30Details
Commit message · Roman Zeyde

chore(core): send MCU attestation only when streaming is supported

[no changelog]

62/100 · AdequateMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
Why it was queued
update trustauthentication path
AI analysis · Low 30/100

This commit changes the Trezor hardware wallet so that a large secondary device-attestation proof (the MCU attestation) is only sent when the caller explicitly requests streaming support. The goal is to avoid sending one oversized response. It is a defensive hardening change rather than a fix for an active vulnerability, and the commit message does not claim it resolves a security issue.

Security candidatefeat(core): allow streaming authenticity proofsby Roman Zeyde · 97848653 · May 25, 2026 · 2 filesMessage 80 · StrongInformational 21Details
Commit message · Roman Zeyde

feat(core): allow streaming authenticity proofs

Since MCU attestation data is quite large, it may fail to be sent
successfully in case of transport packet loss (e.g. over BLE).

- A new boolean `stream` field is added to `AuthenticateDevice` message.
- If it's set, the FW prepares the authenticity proofs and responds with a new `AuthenticityProofSizes` (containing the sizes of the proof-related blobs).
- The host can request any blob chunk by using the new `GetAuthenticityProofChunk` message, allowing to limit the amount of data sent from the device.
- The `AuthenticityProof` message is reconstructed by the host from the received chunks.
- We keep the previous implementation for backwards compatibility.

[no changelog]

80/100 · StrongMessage clarity
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides detailed explanatory context
Why it was queued
update trustauthentication path
AI analysis · Informational 21/100

This commit adds a new optional 'streaming' mode for retrieving device authenticity proofs on Trezor hardware wallets. Instead of sending all attestation data (certificates and signatures) in one large message, the device can now send it in smaller chunks. This is intended to improve reliability over lossy transports like Bluetooth Low Energy. The old one-shot mode is kept for backward compatibility. There is no direct evidence in the commit that this fixes a security vulnerability; it reads as a reliability/feature improvement.

Security candidateRevert "chore(core): don't send MCU attestation"by Roman Zeyde · b6c93a4e · May 25, 2026 · 2 filesMessage 60 · AdequateInformational 19Details
Commit message · Roman Zeyde

Revert "chore(core): don't send MCU attestation"

This reverts commit 8bc6d1b28b130a881119dd7e48ae99166ff9870b.

60/100 · AdequateMessage clarity
✓ Descriptive subject✓ Names a concrete action or component✓ Provides an explanatory body
Why it was queued
update trustauthentication path
AI analysis · Informational 19/100

This commit re-enables a security feature called 'MCU device attestation' for the T3W1 hardware wallet model. It is not a vulnerability fix; it restores a previously removed capability that lets the device cryptographically prove its microcontroller is genuine using a modern quantum-resistant signature scheme (ML-DSA-44).

Security candidatetest(core): test both `AuthenticateDevice` flowsby Roman Zeyde · 3d9da61d · May 25, 2026 · 2 filesMessage 82 · StrongInformational 15Details
Commit message · Roman Zeyde

test(core): test both `AuthenticateDevice` flows

Also, de-duplicate `challenge` parametrization using a fixture.

[no changelog]

82/100 · StrongMessage clarity
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides an explanatory body✓ Mentions testing or verification
Why it was queued
authentication path
AI analysis · Informational 15/100

This commit only adds and reorganizes automated tests for the device-authentication feature on Trezor hardware wallets. It does not change the firmware code that runs on the device, so it cannot introduce a security vulnerability or fix one in the shipped product. The changes make the test suite exercise both the Optiga and Tropic authentication flows, test chunking sizes, and verify that invalid requests are rejected with proper error messages.

Security candidatefeat(common): allow streaming authenticity proofsby Roman Zeyde · 66df4dda · May 25, 2026 · 12 filesMessage 57 · ThinInformational 21Details
Commit message · Roman Zeyde

feat(common): allow streaming authenticity proofs

[no changelog]

57/100 · ThinMessage clarity
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
Why it was queued
boot or update pathauthentication path
AI analysis · Informational 21/100

This commit only changes the protocol definitions (the 'language' the Trezor device and apps use to talk to each other). It adds a new optional streaming mode for requesting device-authenticity proofs, so large proofs can be sent in smaller chunks instead of one big message. There is no actual device firmware logic shown here—only generated message bindings—so it is not a security fix or vulnerability by itself. It is a feature addition that could, in theory, introduce new attack surface once the corresponding firmware code is implemented, but that code is not present in this commit.

Security candidaterefactor(core/caesar): simplify button codeby obrusvit · a534f47d · May 23, 2026 · 5 filesMessage 80 · StrongInformational 17Details
Commit message · obrusvit

refactor(core/caesar): simplify button code

- drop ButtonStyleSheet/ButtonStyle
- inline the visual fields (font, with_outline, with_arms, fixed_width,
offset) directly onto Button. The two-style sheet only encoded a
text-color flip between FG and BG, which is now derived from the
button state at render time.
- make Button::new take ButtonDetails
- replace ButtonType::Nothing with Option
- collapse outline/arms into Decoration enum
- collapse hold forwarders into one method
- drop is_some check in ButtonPage::event
- simplify HoldToConfirm component assuming it's always on the right

[no changelog]

80/100 · StrongMessage clarity
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides detailed explanatory context
Why it was queued
cryptography-sensitive path
AI analysis · Informational 17/100

This is a code cleanup (refactor) of the on-screen button drawing and touch/hold logic for the Trezor hardware wallet's Caesar UI layout. It removes unused style-sheet abstractions, simplifies how buttons are described, and makes the hold-to-confirm component always assume it sits on the right side of the screen. The commit is tagged [no changelog] and contains no explicit security claims. The only behavior-visible change is a small simplification in the page component: when the left button is triggered on the first page, it now always returns a Cancel message instead of first checking whether a cancel button was configured. That change is a simplification based on an existing invariant, not a fix for a known vulnerability.

Security candidatefix(test): skip incompatible tests with BTC-only FWby M1nd3r · 4611d43e · May 22, 2026 · 11 filesMessage 87 · StrongInformational 15Details
Commit message · M1nd3r

fix(test): skip incompatible tests with BTC-only FW

Ten unit tests were failing with BTC-only firmware instead of being skipped.

[no changelog]

87/100 · StrongMessage clarity
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides an explanatory body✓ Mentions testing or verification
Why it was queued
seed or entropy pathsigning or wallet pathparser or protocol path
AI analysis · Informational 15/100

This commit only changes test files so that ten unit tests are skipped when running against the Bitcoin-only firmware variant. It does not modify the actual Trezor firmware code that users run, so it cannot directly affect device security or user funds.

Security candidatefeat(Ripple): Support AccountDelete Transactionby PrisionMike · 27eb67e3 · May 22, 2026 · 18 filesMessage 90 · StrongLow 30Details
Commit message · PrisionMike

feat(Ripple): Support AccountDelete Transaction

- Makes Payment and Account Delete mutually exclusive but mandatory fields in RippleSignTx message.
- Tests for regular deletion and cancellation
- Removed passing `description` in menu items in Caesar
- New TR strings added to `en.json`

90/100 · StrongMessage clarity
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides detailed explanatory context✓ Mentions testing or verification
Why it was queued
cryptography-sensitive pathsigning or wallet path
AI analysis · Low 30/100

This commit adds support for a new Ripple transaction type called AccountDelete to Trezor hardware wallets. It is a feature addition, not a security patch. The change lets users sign transactions that delete a Ripple account and send any remaining balance to a chosen destination. The code adds user-facing confirmation screens and enforces that a transaction cannot be both a payment and an account deletion. There is no direct evidence in the commit of a security vulnerability, but any new signing path deserves careful review because bugs could let an attacker trick a user into deleting an account or signing an unintended transaction.