CVE-2026-57585 — 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 lea…
Published: 2026-06-30 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7