python-msgpack - Debian Package Tracker

general

source: python-msgpack (main)
version: 1.2.1-3
maintainer: Debian OpenStack (DMD)
uploaders: Robert S. Edmonds (DMD) – Thomas Goirand (DMD)
arch: any
std-ver: 4.4.1
VCS: Git (Browse, QA)

versions [more versions can be listed by madison] [old versions available from snapshot.debian.org]

[pool directory]

o-o-stable: 1.0.0-6
oldstable: 1.0.3-2
stable: 1.0.3-3
testing: 1.2.1-1
unstable: 1.2.1-3

versioned links

1.0.0-6: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
1.0.3-2: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
1.0.3-3: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
1.2.1-1: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
1.2.1-3: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]

binaries

python3-msgpack

action needed

A new upstream version is available: 1.2.4 high

A new upstream version 1.2.4 is available, you should consider packaging it.

Created: 2026-10-25 Last update: 2026-11-15 18:50

2 security issues in trixie high

There are 2 open security issues in trixie.

2 important issues:

CVE-2026-57585: MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.1, there is an Out-of-bounds read/crash on Unpacker reuse after a caught error, potentially leading to a DoS attack. If the Unpacker is used repeatedly after an error occurs, the process may crash with a SEGV. This issue has been fixed in version 1.2.1.
CVE-2026-114613: MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.3, the msgpack-python C extension (msgpack._cmsgpack) leaks a decoded map value when deserialization rejects a key with strict_map_key=True (the default). Repeated malformed inputs can cause unbounded process memory growth and denial of service in applications that deserialize attacker-controlled MessagePack data. Both unpackb() and the streaming Unpacker API are affected. The pure-Python fallback does not exhibit this leak in the reported tests. This issue is fixed in version 1.2.3.

Created: 2026-07-02 Last update: 2026-10-24 22:00

1 security issue in forky high

There is 1 open security issue in forky.

1 important issue:

CVE-2026-114613: MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.3, the msgpack-python C extension (msgpack._cmsgpack) leaks a decoded map value when deserialization rejects a key with strict_map_key=True (the default). Repeated malformed inputs can cause unbounded process memory growth and denial of service in applications that deserialize attacker-controlled MessagePack data. Both unpackb() and the streaming Unpacker API are affected. The pure-Python fallback does not exhibit this leak in the reported tests. This issue is fixed in version 1.2.3.

Created: 2026-10-23 Last update: 2026-10-24 22:00

2 security issues in bookworm high

There are 2 open security issues in bookworm.

2 important issues:

CVE-2026-57585: MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.1, there is an Out-of-bounds read/crash on Unpacker reuse after a caught error, potentially leading to a DoS attack. If the Unpacker is used repeatedly after an error occurs, the process may crash with a SEGV. This issue has been fixed in version 1.2.1.
CVE-2026-114613: MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.3, the msgpack-python C extension (msgpack._cmsgpack) leaks a decoded map value when deserialization rejects a key with strict_map_key=True (the default). Repeated malformed inputs can cause unbounded process memory growth and denial of service in applications that deserialize attacker-controlled MessagePack data. Both unpackb() and the streaming Unpacker API are affected. The pure-Python fallback does not exhibit this leak in the reported tests. This issue is fixed in version 1.2.3.

Created: 2026-07-02 Last update: 2026-10-24 22:00

1 security issue in bullseye high

There is 1 open security issue in bullseye.

1 important issue:

CVE-2026-57585: MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.1, there is an Out-of-bounds read/crash on Unpacker reuse after a caught error, potentially leading to a DoS attack. If the Unpacker is used repeatedly after an error occurs, the process may crash with a SEGV. This issue has been fixed in version 1.2.1.

Created: 2026-07-02 Last update: 2026-08-02 20:32

The package has not entered testing even though the delay is over normal

The package has not entered testing even though the 2-day delay is over. Check why.

Created: 2026-10-27 Last update: 2026-11-15 21:32

version in VCS is newer than in repository, is it time to upload? normal

vcswatch reports that this package seems to have a new changelog entry (version 1.2.1-4, distribution unstable) and new commits in its VCS. You should consider whether it's time to make an upload.

Here are the relevant commit messages:

commit 220d942e6e4d01f978393a43886182c4d80a67ef
Author: Thomas Goirand <zigo@debian.org>
Date:   Mon Nov 2 21:46:48 2026 +0100

    * Limit unpacker container preallocation to 10000 items, fixing excessive
    memory allocation from deeply nested, large array or map headers;
    larger containers grow as their contents are decoded (upstream 1.2.4).
    Applied upstream patch:
    - limit-container-preallocation-to-10000-items.patch

commit 34dcd892a0e7e802312bdd5e273015cd82fd2fde
Author: Thomas Goirand <zigo@debian.org>
Date:   Mon Nov 2 21:46:48 2026 +0100

    Refresh CVE-2026-114613 patch to apply without offsets
    
    quilt push reported 5 hunks applying with (offset -1 lines) on this
    branch's queue. Renumber the hunks; the applied result is byte-for-byte
    identical (verified by applying old and refreshed versions to the same
    tree state and comparing).

commit 48c990a005e8f1a2135f3d91b52aec513a94024f
Author: Thomas Goirand <zigo@debian.org>
Date:   Sat Oct 24 17:11:29 2026 +0200

      * Build with Cython 3.0.x: drop the @cython.critical_section
        directives (Cython 3.1+ only, inert without free-threaded CPython)
        so the trixie backport builds.

Created: 2026-10-24 Last update: 2026-11-11 13:00

lintian reports 2 warnings normal

Lintian reports 2 warnings about this package. You should make the package lintian clean getting rid of them.

Created: 2021-01-27 Last update: 2026-10-25 04:31

debian/patches: 2 patches to forward upstream low

Among the 5 debian patches available in version 1.2.1-3 of the package, we noticed the following issues:

2 patches where the metadata indicates that the patch has not yet been forwarded upstream. You should either forward the patch upstream or update the metadata to document its real status.

Created: 2026-10-25 Last update: 2026-10-25 06:22

Standards version of the package is outdated. wishlist

The package should be updated to follow the last version of Debian Policy (Standards-Version 4.7.4 instead of 4.4.1).

Created: 2020-01-21 Last update: 2026-10-24 21:20

testing migrations

excuses:
- Migration status for python-msgpack (1.2.1-1 to 1.2.1-3): BLOCKED: Rejected/violates migration policy/introduces a regression
- Issues preventing migration:
- ∙ ∙ Autopkgtest for borgbackup2/2.0.0b25-4: amd64: Test triggered (failure will be ignored), arm64: Test triggered (failure will be ignored), armhf: Pass, i386: Pass, ppc64el: Pass, riscv64: Pass, s390x: Pass
- ∙ ∙ Autopkgtest for dask.distributed/2024.12.1+ds-3: amd64: Pass, arm64: Pass, armhf: Pass, i386: Pass, ppc64el: Pass, riscv64: Test triggered (failure will be ignored), s390x: Pass
- ∙ ∙ Autopkgtest for hishel/1.4.0-1: i386: Pass ♻ (reference ♻), riscv64: Pass ♻ (reference ♻)
- ∙ ∙ Autopkgtest for pdm/2.29.5-1: i386: Pass ♻ (reference ♻), riscv64: Pass ♻ (reference ♻)
- ∙ ∙ Autopkgtest for python-mashumaro/3.17-1: i386: Pass ♻ (reference ♻), riscv64: Pass ♻ (reference ♻)
- ∙ ∙ Autopkgtest for python-msgpack/1.2.1-3: amd64: Regression ♻ (reference ♻), arm64: Regression ♻ (reference ♻), armhf: Regression ♻ (reference ♻), i386: Regression ♻ (reference ♻), ppc64el: Regression ♻ (reference ♻), riscv64: Regression ♻ (reference ♻), s390x: Regression ♻ (reference ♻)
- Additional info (not blocking):
- ∙ ∙ Piuparts tested OK - https://piuparts.debian.org/sid/source/p/python-msgpack.html
- ∙ ∙ Reproduced on amd64 - info
- ∙ ∙ Reproduced on arm64 - info
- ∙ ∙ Reproduced on armhf - info
- ∙ ∙ Reproduced on i386 - info
- ∙ ∙ 22 days old (needed 2 days)
- Not considered

news

[rss feed]

[2026-10-24] Accepted python-msgpack 1.2.1-3 (source) into unstable (Thomas Goirand)
[2026-10-24] Accepted python-msgpack 1.2.1-2 (source) into unstable (Thomas Goirand)
[2026-09-24] python-msgpack 1.2.1-1 MIGRATED to testing (Debian testing watch)
[2026-09-19] Accepted python-msgpack 1.2.1-1 (source) into unstable (Thomas Goirand)
[2026-07-10] python-msgpack 1.1.2-4 MIGRATED to testing (Debian testing watch)
[2026-07-07] Accepted python-msgpack 1.1.2-4 (source) into unstable (Thomas Goirand)
[2026-07-07] python-msgpack 1.1.2-3 MIGRATED to testing (Debian testing watch)
[2026-07-05] Accepted python-msgpack 1.1.2-3 (source) into unstable (Thomas Goirand)
[2026-02-20] python-msgpack 1.1.2-2 MIGRATED to testing (Debian testing watch)
[2026-02-09] Accepted python-msgpack 1.1.2-2 (source) into unstable (Thomas Goirand)
[2025-12-14] python-msgpack 1.1.2-1 MIGRATED to testing (Debian testing watch)
[2025-12-07] Accepted python-msgpack 1.1.2-1 (source) into unstable (Thomas Goirand)
[2023-08-18] python-msgpack 1.0.3-3 MIGRATED to testing (Debian testing watch)
[2023-08-15] Accepted python-msgpack 1.0.3-3 (source) into unstable (Thomas Goirand)
[2022-11-23] python-msgpack 1.0.3-2 MIGRATED to testing (Debian testing watch)
[2022-11-20] Accepted python-msgpack 1.0.3-2 (source) into unstable (Thomas Goirand)
[2022-02-22] python-msgpack 1.0.3-1 MIGRATED to testing (Debian testing watch)
[2022-02-17] Accepted python-msgpack 1.0.3-1 (source) into unstable (Thomas Goirand)
[2021-08-26] python-msgpack 1.0.2-2 MIGRATED to testing (Debian testing watch)
[2021-08-16] Accepted python-msgpack 1.0.2-2 (source) into unstable (Thomas Goirand)
[2021-03-08] Accepted python-msgpack 1.0.2-1 (source) into experimental (Thomas Goirand)
[2020-11-26] python-msgpack 1.0.0-6 MIGRATED to testing (Debian testing watch)
[2020-11-24] Accepted python-msgpack 1.0.0-6 (source) into unstable (Thomas Goirand)
[2020-11-20] Accepted python-msgpack 1.0.0-5 (source) into unstable (Thomas Goirand)
[2020-10-14] Accepted python-msgpack 1.0.0-4 (source) into unstable (Thomas Goirand)
[2020-10-14] Accepted python-msgpack 1.0.0-3 (source) into unstable (Thomas Goirand)
[2020-10-14] Accepted python-msgpack 1.0.0-2 (source) into unstable (Thomas Goirand)
[2020-09-24] Accepted python-msgpack 1.0.0-1 (source) into experimental (Thomas Goirand)
[2020-03-26] python-msgpack 0.6.2-1 MIGRATED to testing (Debian testing watch)
[2020-03-14] Accepted python-msgpack 0.6.2-1 (source) into unstable (Thomas Goirand)

bugs [bug history graph]

all: 0

links

homepage
lintian (0, 2)
buildd: logs, reproducibility, cross
popcon
browse source code
other distros
security tracker
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ubuntu

[Information about Ubuntu for Debian Developers]

version: 1.1.2-4