CVE-2026-57585
High · 7.5CVSS
7.5
EPSS
0.5%
Published
Jun 30, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
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