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cve.nowby Sazabi
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PyPIPackage

msgpack

2 known vulnerabilities (2 high), with the versions each affects and the releases that fix them.

Latest release
1.2.4 (Oct 26, 2026): no advisory affects it
Newest unaffected release
1.2.4 (Oct 26, 2026), the latest release
Advisories
2 · 2 high
Weekly downloads
56.4M
Dependents
17.1K
Releases
36 since 0.5.0 (Jan 6, 2018)
Registry
PyPI
Releases read
Nov 8, 2026

Version timeline

Every release cve.now has on record, lowest version on the left; each bar is a run of versions an advisory affects.

Advisories 2

  • MessagePack: Unbounded memory leak in msgpack C extension on strict_map_key validation failure

    Affected: fixed in 1.2.3.

    Fixed in 1.2.3 (released Sep 29, 2026, 23 days before disclosure).

    The latest release, 1.2.4, is not affected.

  • MessagePack: Out-of-bounds read/crash on Unpacker reuse after caught error

    Affected: fixed in 1.2.1.

    Fixed in 1.2.1 (released Jun 18, 2026, 12 days before disclosure).

    The latest release, 1.2.4, is not affected.