Cap multipart boundary length at 256 bytes#282
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RFC 2046 §5.1.1 recommends boundaries be at most 70 bytes. Every HTTP client in common use stays well under that. Cap the parser at 256 to keep the per-chunk look-back work bounded by a constant rather than attacker-controlled input.
This was referenced May 10, 2026
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* security(deps): bump python-multipart 0.0.27 → 0.0.28 (CVE-2026-42561) 0.0.28 caps multipart boundary length at 256 bytes (Kludex/python-multipart#282), patching the HIGH-severity DoS where a crafted boundary forces O(n²) tail scans. 0.0.27 added header limits but did not bound the boundary scan itself. Affects mira-ingest (POST /ingest/photo) and mira-mcp (POST /ingest/pdf) — both accept multipart uploads from untrusted callers. CRA-252. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * feat(hub): external ID columns on cmms_equipment for i3X interop Adds 7 nullable TEXT columns to cmms_equipment so a MIRA asset can round-trip with adjacent systems (cmms_id, plc_tag, scada_path, manufacturer_part_number, uns_topic_path, erp_asset_id, drawing_reference). serial_number already existed and is unchanged. - migration 013_external_ids.sql (NOT auto-run — Mike approves) - /api/assets/by-tag returns externalIds {} on the asset payload - /m/[tag] renders a collapsed "External IDs" section, hidden when empty (only shown when at least one field is populated — keeps the glove-friendly main view uncluttered) - seed-stardust-racers populates plc_tag / scada_path / uns_topic_path / manufacturer_part_number for SR-SUMP-001 for the May 21 demo CRA-258. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Mike (FactoryLM) <harperhousebuyers@gmail.com> Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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This MR contains the following updates: | Package | Type | Update | Change | OpenSSF | |---|---|---|---|---| | [debugpy](https://aka.ms/debugpy) ([source](https://github.com/microsoft/debugpy)) | dev | patch | `1.8.20` → `1.8.21` | [](https://securityscorecards.dev/viewer/?uri=github.com/microsoft/debugpy) | | [numpy](https://github.com/numpy/numpy) ([changelog](https://numpy.org/doc/stable/release)) | dependencies | patch | `2.4.4` → `2.4.6` | [](https://securityscorecards.dev/viewer/?uri=github.com/numpy/numpy) | | [pydantic-settings](https://github.com/pydantic/pydantic-settings) ([changelog](https://github.com/pydantic/pydantic-settings/releases)) | dependencies | patch | `2.14.0` → `2.14.2` | [](https://securityscorecards.dev/viewer/?uri=github.com/pydantic/pydantic-settings) | | [python-multipart](https://github.com/Kludex/python-multipart) ([changelog](https://github.com/Kludex/python-multipart/blob/master/CHANGELOG.md)) | dependencies | patch | `^0.0.22` → `^0.0.32` | [](https://securityscorecards.dev/viewer/?uri=github.com/Kludex/python-multipart) | | [types-requests](https://github.com/python/typeshed) ([changelog](https://github.com/typeshed-internal/stub_uploader/blob/main/data/changelogs/requests.md)) | dependencies | patch | `2.32.0.20240523` → `2.32.4.20260324` | [](https://securityscorecards.dev/viewer/?uri=github.com/python/typeshed) | --- ### Release Notes <details> <summary>microsoft/debugpy (debugpy)</summary> ### [`v1.8.21`](https://github.com/microsoft/debugpy/releases/tag/v1.8.21): debugpy v1.8.21 [Compare Source](microsoft/debugpy@v1.8.20...v1.8.21) Fixes for: - Return evaluate result in DAP response body instead of writing to stdout: [#​2027](microsoft/debugpy#2027) - Prevent invalid `scopes` request from crashing debug session: [#​2026](microsoft/debugpy#2026) - Skip uninitialized `__slots__` in variable resolver: [#​2024](microsoft/debugpy#2024) - Handle `-c` arguments that are `bytes` instead of `str`: [#​2021](microsoft/debugpy#2021) - Fix evaluation of variables from chained exception frames: [#​2018](microsoft/debugpy#2018) - `ContinueRequest` with a specific `threadId` no longer resumes all threads (in-process adapter): [#​2012](microsoft/debugpy#2012) - Avoid strong reference to exceptions during unwind: [#​2008](microsoft/debugpy#2008) - Show error message on evaluate failures in the hover context: [#​2006](microsoft/debugpy#2006) - Display `dlerror` output when `dlopen` fails: [#​2000](microsoft/debugpy#2000) - Replace removed `pkgutil.get_loader` with `importlib.util.find_spec` in `get_fullname`: [#​1998](microsoft/debugpy#1998) Enhancements: - Add option to ignore all system exit codes: [#​2017](microsoft/debugpy#2017) - Pull changes from pydevd up to March 2026: [#​2010](microsoft/debugpy#2010) Infrastructure work: - Suppress Flawfinder false positives on Cython memcpy / read-loop iterators (TSA [#​2816216](https://github.com/microsoft/debugpy/issues/2816216), [#​2816217](https://github.com/microsoft/debugpy/issues/2816217), [#​2816218](https://github.com/microsoft/debugpy/issues/2816218), [#​2816219](https://github.com/microsoft/debugpy/issues/2816219), [#​2816220](https://github.com/microsoft/debugpy/issues/2816220)): [#​2028](microsoft/debugpy#2028), [#​2029](microsoft/debugpy#2029), [#​2030](microsoft/debugpy#2030), [#​2031](microsoft/debugpy#2031), [#​2032](microsoft/debugpy#2032) Thanks to [@​maxbachmann](https://github.com/maxbachmann), [@​mfussenegger](https://github.com/mfussenegger), and [@​sambrightman](https://github.com/sambrightman) for the commits. </details> <details> <summary>numpy/numpy (numpy)</summary> ### [`v2.4.6`](https://github.com/numpy/numpy/releases/tag/v2.4.6): (May 18, 2026) [Compare Source](numpy/numpy@v2.4.5...v2.4.6) ### NumPy 2.4.6 Release Notes NumPy 2.4.6 is a quick release that fixes a regression discovered in the 2.4.5 release. This release supports Python versions 3.11-3.14 #### Contributors A total of 4 people contributed to this release. People with a "+" by their names contributed a patch for the first time. - !EarlMilktea - Charles Harris - Sebastian Berg - Warren Weckesser #### Pull requests merged A total of 4 pull requests were merged for this release. - [#​31444](numpy/numpy#31444): MAINT: Prepare 2.4.x for further development - [#​31453](numpy/numpy#31453): BUG: Fix regression in `arr.conj()` - [#​31459](numpy/numpy#31459): BUG: `np.linalg.svd(..., hermitian=True)` returns non-unitary... - [#​31460](numpy/numpy#31460): BUG: Don't call INCREF/DECREF on descr in NpyStringAcquireAllocator... ### [`v2.4.5`](https://github.com/numpy/numpy/releases/tag/v2.4.5): (May 15, 2026) [Compare Source](numpy/numpy@v2.4.4...v2.4.5) ### NumPy 2.4.5 Release Notes NumPy 2.4.5 is a patch release that fixes bugs discovered after the 2.4.4 release, has some typing improvements, and maintains infrastructure. This release supports Python versions 3.11-3.14 #### Contributors A total of 17 people contributed to this release. People with a "+" by their names contributed a patch for the first time. - Aleksei Nikiforov - Anarion Zuo + - Ankit Ahlawat - Breno Favaretto + - Charles Harris - Igor Krivenko + - Ijtihed Kilani + - Joren Hammudoglu - Maarten Baert + - Matti Picus - Nathan Goldbaum - Praneeth Kodumagulla + - Ralf Gommers - RoomWithOutRoof + - Sebastian Berg - Warren Weckesser - div + #### Pull requests merged A total of 28 pull requests were merged for this release. - [#​31093](numpy/numpy#31093): MAINT: Prepare 2.4.x for further development - [#​31182](numpy/numpy#31182): TYP: fix `np.shape` assignability issue for python lists ([#​31171](numpy/numpy#31171)) - [#​31197](numpy/numpy#31197): ENH: Return rank 0 for empty matrices in matrix\_rank ([#​30422](numpy/numpy#30422)) - [#​31198](numpy/numpy#31198): CI/BUG: add native jobs for s390x, fix bug in `pack_inner`... - [#​31199](numpy/numpy#31199): BUG: f2py map complex\_long\_double to NPY\_CLONGDOUBLE - [#​31205](numpy/numpy#31205): MAINT: f2py: Stop setting re.\_MAXCACHE to 50. - [#​31206](numpy/numpy#31206): BUG: fix heap buffer overflow in timedelta to string casts - [#​31207](numpy/numpy#31207): MAINT: Rename ppc64le and s390x workflow ([#​31121](numpy/numpy#31121)) - [#​31208](numpy/numpy#31208): BUG: Fix matvec/vecmat in-place aliasing (out=input produces... - [#​31209](numpy/numpy#31209): TYP: `tile`: accept numpy scalars and arrays as second argument... - [#​31211](numpy/numpy#31211): DEP: Undo deprecation for np.dtype() signature used by old pickles... - [#​31212](numpy/numpy#31212): REV: Manual revert of float16 svml use ([#​31178](numpy/numpy#31178)) - [#​31222](numpy/numpy#31222): TYP: `ix_` fix for boolean and non-1d input ([#​31218](numpy/numpy#31218)) - [#​31329](numpy/numpy#31329): BUG: incorrect temp elision for new-style (NEP 43) user-defined... - [#​31330](numpy/numpy#31330): TYP: fix sliding\_window\_view axis parameter typing - [#​31335](numpy/numpy#31335): BUG: Prevent deadlock due to downstream importing NumPy in dlopen... - [#​31336](numpy/numpy#31336): BUG: Fix segfault in nditer.multi\_index when \_\_getitem\_\_ raises... - [#​31338](numpy/numpy#31338): TYP: Fix ruff lint error - [#​31357](numpy/numpy#31357): BUG: fix memory leak in np.zeros when fill-zero loop raises ([#​31320](numpy/numpy#31320)) - [#​31358](numpy/numpy#31358): BUG: np.einsum() fails with a 0-dimensional out argument and... - [#​31379](numpy/numpy#31379): BUG: Fix signed overflow issue in npy\_gcd for INT\_MIN on s390x... - [#​31383](numpy/numpy#31383): CI: remove Cirrus CI FreeBSD job ([#​31380](numpy/numpy#31380)) - [#​31390](numpy/numpy#31390): BUILD: newer MKL uses so.3 - [#​31391](numpy/numpy#31391): BLD/MAINT: improve support for Intel LLVM compilers - [#​31401](numpy/numpy#31401): BUG: Avoid UB in [safe]()\[add,sub,mul] helpers ([#​31396](numpy/numpy#31396)) - [#​31402](numpy/numpy#31402): BUG: exclude \_\_pycache\_\_ directories from wheels ([#​31397](numpy/numpy#31397)) - [#​31404](numpy/numpy#31404): TYP: `_NestedSequence` type parameter default to work around... - [#​31426](numpy/numpy#31426): TYP: Fix `DTypeLike` runtime type-checker support ([#​31425](numpy/numpy#31425)) </details> <details> <summary>pydantic/pydantic-settings (pydantic-settings)</summary> ### [`v2.14.2`](https://github.com/pydantic/pydantic-settings/releases/tag/v2.14.2) [Compare Source](pydantic/pydantic-settings@v2.14.1...v2.14.2) #### What's Changed This is a security patch release. - Prevent `NestedSecretsSettingsSource` from following symlinks outside `secrets_dir` by [@​hramezani](https://github.com/hramezani) in [#​889](pydantic/pydantic-settings#889) - Prepare release 2.14.2 by [@​hramezani](https://github.com/hramezani) in [#​890](pydantic/pydantic-settings#890) ##### Security Fixes [GHSA-4xgf-cpjx-pc3j](GHSA-4xgf-cpjx-pc3j): `NestedSecretsSettingsSource` with `secrets_nested_subdir=True` could follow a symbolic link inside `secrets_dir` pointing outside it, reading out-of-tree files into settings values and bypassing the `secrets_dir_max_size` cap. Affected versions: `>= 2.12.0, < 2.14.2`. **Full Changelog**: <pydantic/pydantic-settings@v2.14.1...v2.14.2> ### [`v2.14.1`](https://github.com/pydantic/pydantic-settings/releases/tag/v2.14.1) [Compare Source](pydantic/pydantic-settings@v2.14.0...v2.14.1) #### What's Changed - Bump the python-packages group with 4 updates by [@​dependabot](https://github.com/dependabot)\[bot] in [#​850](pydantic/pydantic-settings#850) - Bump the python-packages group with 5 updates by [@​dependabot](https://github.com/dependabot)\[bot] in [#​854](pydantic/pydantic-settings#854) - Bump the github-actions group with 3 updates by [@​dependabot](https://github.com/dependabot)\[bot] in [#​853](pydantic/pydantic-settings#853) - Bump the python-packages group with 2 updates by [@​dependabot](https://github.com/dependabot)\[bot] in [#​856](pydantic/pydantic-settings#856) - Fix field named `cls` conflicting with classmethod parameter by [@​hramezani](https://github.com/hramezani) in [#​858](pydantic/pydantic-settings#858) - Prepare release 2.14.1 by [@​hramezani](https://github.com/hramezani) in [#​859](pydantic/pydantic-settings#859) **Full Changelog**: <pydantic/pydantic-settings@v2.14.0...v2.14.1> </details> <details> <summary>Kludex/python-multipart (python-multipart)</summary> ### [`v0.0.32`](https://github.com/Kludex/python-multipart/blob/HEAD/CHANGELOG.md#0032-2026-06-04) [Compare Source](Kludex/python-multipart@0.0.31...0.0.32) - Speed up partial-boundary scanning for CR/LF-dense part data [#​300](Kludex/python-multipart#300). ### [`v0.0.31`](https://github.com/Kludex/python-multipart/blob/HEAD/CHANGELOG.md#0031-2026-06-04) [Compare Source](Kludex/python-multipart@0.0.30...0.0.31) - Speed up multipart header parsing and callback dispatch [#​295](Kludex/python-multipart#295). - Bound header field name size before validating [#​296](Kludex/python-multipart#296). - Validate `Content-Length` is non-negative in `parse_form` [#​297](Kludex/python-multipart#297). ### [`v0.0.30`](https://github.com/Kludex/python-multipart/blob/HEAD/CHANGELOG.md#0030-2026-05-31) [Compare Source](Kludex/python-multipart@0.0.29...0.0.30) - Parse `application/x-www-form-urlencoded` bodies per the WHATWG URL standard, treating only `&` as a field separator [#​290](Kludex/python-multipart#290). - Ignore RFC 2231/5987 extended parameters (`name*`, `filename*`) in `parse_options_header`, keeping the plain parameter authoritative per [RFC 7578 §4.2](https://datatracker.ietf.org/doc/html/rfc7578#section-4.2) [#​291](Kludex/python-multipart#291). ### [`v0.0.29`](https://github.com/Kludex/python-multipart/blob/HEAD/CHANGELOG.md#0029-2026-05-17) [Compare Source](Kludex/python-multipart@0.0.28...0.0.29) - Handle malformed RFC 2231 continuations in `parse_options_header` [#​270](Kludex/python-multipart#270). ### [`v0.0.28`](https://github.com/Kludex/python-multipart/blob/HEAD/CHANGELOG.md#0028-2026-05-10) [Compare Source](Kludex/python-multipart@0.0.27...0.0.28) - Speed up partial-boundary tail scan via `bytes.find` [#​281](Kludex/python-multipart#281). - Cap multipart boundary length at 256 bytes [#​282](Kludex/python-multipart#282). ### [`v0.0.27`](https://github.com/Kludex/python-multipart/blob/HEAD/CHANGELOG.md#0027-2026-04-27) [Compare Source](Kludex/python-multipart@0.0.26...0.0.27) - Add multipart header limits [#​267](Kludex/python-multipart#267). - Pass parse offsets via constructors [#​268](Kludex/python-multipart#268). ### [`v0.0.26`](https://github.com/Kludex/python-multipart/blob/HEAD/CHANGELOG.md#0026-2026-04-10) [Compare Source](Kludex/python-multipart@0.0.25...0.0.26) - Skip preamble before the first multipart boundary more efficiently [#​262](Kludex/python-multipart#262). - Silently discard epilogue data after the closing multipart boundary [#​259](Kludex/python-multipart#259). ### [`v0.0.25`](https://github.com/Kludex/python-multipart/blob/HEAD/CHANGELOG.md#0025-2026-04-10) [Compare Source](Kludex/python-multipart@0.0.24...0.0.25) - Add MIME content type info to `File` [#​143](Kludex/python-multipart#143). - Handle CTE values case-insensitively [#​258](Kludex/python-multipart#258). - Remove custom `FormParser` classes [#​257](Kludex/python-multipart#257). - Add `UPLOAD_DELETE_TMP` to `FormParser` config [#​254](Kludex/python-multipart#254). - Emit `field_end` for trailing bare field names on finalize [#​230](Kludex/python-multipart#230). - Handle multipart headers case-insensitively [#​252](Kludex/python-multipart#252). - Apply Apache-2.0 properly [#​247](Kludex/python-multipart#247). ### [`v0.0.24`](https://github.com/Kludex/python-multipart/blob/HEAD/CHANGELOG.md#0024-2026-04-05) [Compare Source](Kludex/python-multipart@0.0.23...0.0.24) - Validate `chunk_size` in `parse_form()` [#​244](Kludex/python-multipart#244). ### [`v0.0.23`](https://github.com/Kludex/python-multipart/blob/HEAD/CHANGELOG.md#0023-2026-04-05) [Compare Source](Kludex/python-multipart@0.0.22...0.0.23) - Remove unused `trust_x_headers` parameter and `X-File-Name` fallback [#​196](Kludex/python-multipart#196). - Return processed length from `QuerystringParser._internal_write` [#​229](Kludex/python-multipart#229). - Cleanup metadata dunders from `__init__.py` [#​227](Kludex/python-multipart#227). </details> --- - [ ] <!-- rebase-check -->If you want to rebase/retry this MR, check this box --- This MR has been generated by [Mend Renovate](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4xMTAuMTYiLCJ1cGRhdGVkSW5WZXIiOiI0My4yNDYuMSIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsiZGVwZW5kZW5jaWVzIiwicmVub3ZhdGUiXX0=--> See merge request swiss-armed-forces/cyber-command/cea/loom!460 Co-authored-by: Loom MR Pipeline Trigger <group_103951964_bot_9504bb8dead6d4e406ad817a607f24be@noreply.gitlab.com> Co-authored-by: shrewd-laidback palace <shrewd-laidback-palace-736-c41-2c1-e464fc974@swiss-armed-forces-open-source.ch>
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Summary
MAX_BOUNDARY_LENGTH = 256constant and reject boundaries longer than that inMultipartParser.__init__Why
RFC 2046 §5.1.1 recommends boundaries be at most 70 bytes. Surveying the boundary-generation code in major HTTP clients shows boundaries cluster between 32 and 71 bytes; nothing in common use comes near 256.
-net/httpmime/multipartform-data(npm)----formdata-ureq-+ 16 random bytes hex--form----formdata-undici-0+ 11 zero-padded digits----formdata-polyfill-+Math.random()----WebKitFormBoundary+ 16 random alnumrequests)os.urandom(16).hex()uuid.uuid4().hex(also rejects >70 itself)Capping at 256 bounds the parser's per-chunk look-back region by a constant rather than by attacker-controlled input from the `Content-Type` header. The cap accommodates every HTTP client in practice (4x headroom over the longest observed).
Test plan
AI Disclaimer
This PR was developed with the assistance of either Claude or Codex. I've reviewed and verified the changes.