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CVE-2026-107300

CVE-2026-107300 · msgpack5: Many buffered values can exhaust the streaming decoder stack

This page contains facts from public vulnerability sources. Check the original advisory before updating.

msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the streaming decoder recursively invokes itself for each complete MessagePack value remaining in a chunk. A remote peer can send one chunk containing many small valid values, causing recursion proportional to the value count, exhausting the JavaScript call stack, and interrupting the process or stream. This issue is fixed in version 6.1.0.

CVSS 7.5 · High · EPSS 0.4% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • msgpack5

    Versions
    • < 6.1.0: Affected

    No fix published

  • msgpack5 npm

    Affected ranges
    • SEMVER: < 6.1.0

    Update to 6.1.0

Original sources

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