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msgpack-python

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CNA

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1

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Related CVEsRelated VendorsRelated AssignersReports
1Vulnerabilities found
CVE-2026-57585
Assigner-GitHub, Inc.
ShareView Details
Assigner-GitHub, Inc.
CVSS Score-7.5||HIGH
EPSS-0.28% / 19.65%
||
7 Day CHG~0.00%
Published-30 Jun, 2026 | 21:36
Updated-02 Jul, 2026 | 18:43
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
MessagePack: Out-of-bounds read/crash on Unpacker reuse after caught error

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.

Action-Not Available
Vendor-msgpack
Product-msgpack-python
CWE ID-CWE-416
Use After Free