msgpack vulnerabilities

Browse known CVEs and advisories by package and ecosystem. Severity tells you the worst case. What determines real risk is whether the vulnerable code actually runs in your applications.

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CVE-IDSeverityPackage summary
CVE-2026-54522Lowmsgpack: MessagePack::Buffer#clear Use-After-Free that Enables Cross-Buffer DisclosureGHSA-6V7P-G79W-8964Highmsgpack: MessagePack for Python: Out-of-bounds read / crash on Unpacker reuse after a caught error

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