LOW 3.7 NVD
CVE-2026-107296
msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, decoding a negative signed 64-bit integer modifies the corresponding bytes
msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, decoding a negative signed 64-bit integer modifies the corresponding bytes in the caller-provided input buffer while computing the value. Applications that retain or reuse encoded input for integrity checks, logging, or later processing can observe silently corrupted data, while positive integers and other MessagePack value types are unaffected. This issue is fixed in version 6.1.0.
References
- https://github.com/mcollina/msgpack5/commit/82b70393a824e1088a45a377548d1d9ab82faf91
- https://github.com/mcollina/msgpack5/releases/tag/v6.1.0
- https://github.com/mcollina/msgpack5/security/advisories/GHSA-qw35-55vc-rhgj
This low severity vulnerability with a CVSS score of 3.7 was published on 2026-10-08 via NVD.
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