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Bump msgpack from 1.0.8 to 1.2.1#19

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Bump msgpack from 1.0.8 to 1.2.1#19
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dependabot/pip/msgpack-1.2.1

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Bumps msgpack from 1.0.8 to 1.2.1.

Release notes

Sourced from msgpack's releases.

v1.2.1

What's Changed

Full Changelog: msgpack/msgpack-python@v1.2.0...v1.2.1

v1.2.0

What's Changed

New Contributors

... (truncated)

Changelog

Sourced from msgpack's changelog.

1.2.1

Release Date: 2026-06-19

Fix a segfault when calling Unpacker.unpack() or Unpacker.skip() after an unpacking failure. But note that reusing the same Unpacker instance after an unpacking failure is not supported. Please create a new Unpacker instance instead. GHSA-6v7p-g79w-8964

1.2.0

Release Date: 2026-06-11

  • Support free threaded Python. #654, #686
  • Dropped support for Python 3.9. #656
  • Fix missing error checks in C code. #665, #666, #667, #672
  • Fix strict_map_key option didn't work for object_pairs_hook. #673
  • Increase DEFAULT_RECURSE_LIMIT of Unpacker to 1024. #676
  • Fix memory leak when Unpacker returns error for invalid input. #671
  • Fix Packer.pack_ext_type() ignored autoreset option. #663
  • Fix Timestamp.from_datetime() returning wrong value for pre-epoch datetimes. #662
  • Fix use-after-free in unpackb() and Unpacker.unpack() for non-contiguous input. #677
  • Fix possible memory leak when calling Unpacker.__init__() several times. #687

1.1.2

Release Date: 2025-10-08

This release does not change source code. It updates only building wheels:

  • Update Cython to v3.1.4
  • Update cibuildwheel to v3.2.0
  • Drop Python 3.8
  • Add Python 3.14
  • Add windows-arm

1.1.1

Release Date: 2025-06-13

  • No change from 1.1.1rc1.

1.1.1rc1

Release Date: 2025-06-06

  • Update Cython to 3.1.1 and cibuildwheel to 2.23.3.

... (truncated)

Commits
  • 448d43f release v1.2.1 (#698)
  • 2c56ddb Merge commit from fork
  • 0f4f350 Bump pypa/cibuildwheel from 4.0.0 to 4.1.0 in the all-dependencies group (#694)
  • 11ed0a5 release v1.2.0 (#692)
  • c410a38 Bump pypa/cibuildwheel from 3.4.1 to 4.0.0 (#691)
  • 97ba6ca skip ci: remove unneeded CIBW_SKIP option
  • cdde1b0 Wheels CI hangs for MacOS Intel (#689)
  • 5eb57e1 release v1.2.0rc1 (#681)
  • 77395c1 Harden Unpacker.__init__ re-entry cleanup to prevent buffer/context leaks (...
  • 7df7136 Guard Packer buffer protocol hooks with Cython critical sections (#686)
  • Additional commits viewable in compare view

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Note

Medium Risk
Transitive serialization dependency upgrade spans major msgpack releases with security fixes and possible behavior changes; validate installs and any code paths that pack/unpack MessagePack, especially if Python 3.9 is still in use.

Overview
Pins msgpack from 1.0.8 to 1.2.1 in requirements.txt (auto-generated lockfile).

This is a large upstream jump (1.0.x → 1.2.x), not a patch-only bump. Notable library changes in that range include security and stability fixes (use-after-free in unpack paths, memory leaks on bad input, segfault after unpack failure in 1.2.1), stricter unpack behavior, a higher default unpack recursion limit, and dropped Python 3.9 support in msgpack 1.2.0. There is no application code change in this PR—only the dependency pin.

Reviewed by Cursor Bugbot for commit 8368768. Bugbot is set up for automated code reviews on this repo. Configure here.

Bumps [msgpack](https://github.com/msgpack/msgpack-python) from 1.0.8 to 1.2.1.
- [Release notes](https://github.com/msgpack/msgpack-python/releases)
- [Changelog](https://github.com/msgpack/msgpack-python/blob/main/CHANGELOG.md)
- [Commits](msgpack/msgpack-python@v1.0.8...v1.2.1)

---
updated-dependencies:
- dependency-name: msgpack
  dependency-version: 1.2.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file python Pull requests that update python code labels Jun 19, 2026

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Risk: medium. Cursor Bugbot passed but no Bugbot review comment is present, so auto-approval is withheld. The msgpack 1.0.8→1.2.1 jump may affect Python 3.9 CI compatibility; human review recommended. Reviewers assigned.

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Sent by Cursor Approval Agent: Pull Request Approver

@cursor cursor Bot requested a review from YLGH June 19, 2026 23:46
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