CVE-2026-57585: MessagePack: Out-of-bounds read/crash on Unpacker reuse after caught error
msgpack · msgpack-python
Affected: msgpack-python · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 42% of scored CVEs
DescriptionCVE.org
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 products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- msgpack · msgpack-python< 1.2.1
On the Atlas
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CoverageNo articles yet
No CyberSIXT article names CVE-2026-57585 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.