python-msgpack: MessagePack is the serializer implementation for Python msgpack.org
CVE-2026-57585 is fixed in python-msgpack on 1 platform, first by OPENSUSE-SU-2026:21239-1, released July 5, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| python-msgpack · Debian 14 | 1.1.2-3 | DEBIAN-CVE-2026-57585 | Jul 7, 2026 |
| python-msgpack · opensuse-leap 16.0 | 1.1.0-160000.3.1 | OPENSUSE-SU-2026:21239-1 | Jul 5, 2026 |
| python-msgpack · sles 15.6 | 1.0.7-150600.3.5.1 | SUSE-SU-2026:4443-1 | Oct 5, 2026 |
| python-msgpack · sles 15.7 | 1.0.7-150600.3.5.1 | SUSE-SU-2026:4443-1 | Oct 5, 2026 |
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