Vulnerability library
Security checkJuly 15, 2026

protobufjs: Memory amplification from preserved unknown fields in binary decode

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Medium severitynpmprotobufjs

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Description

protobufjs 8.2.0 added support for preserving unknown fields encountered during binary decode. Affected versions preserved unknown wire elements in message.$unknowns and did not provide a decode-time option to discard unknown fields before retaining them.

Recommendation

Update the protobufjs package to the latest compatible version. Followings are version details:

  • Affected version(s): >= 8.2.0, <= 8.4.2
  • Patched version(s): 8.5.0

References

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Related Issues

See something that needs correcting? Let us knowUpdated July 15, 2026