CVE-2026-57585

ADVISORY - nist

Summary

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.

EPSS Score⁠: 0.00488 (0.398)

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-416⁠

Use After Free

Impacted images

Advisories

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