CVE-2026-44289: protobuf.js: Denial of service through unbounded protobuf recursion

May 12, 2026 (updated May 14, 2026)

protobufjs could recurse without a depth limit while decoding nested protobuf data. This affected both skipping unknown group fields and generated decoding of nested message fields.

A crafted protobuf binary payload could cause the JavaScript call stack to be exhausted during decoding.

References

github.com/advisories/GHSA-685m-2w69-288q
github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v7.5.6
github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v8.0.2
github.com/protobufjs/protobuf.js/security/advisories/GHSA-685m-2w69-288q
nvd.nist.gov/vuln/detail/CVE-2026-44289

Code Behaviors & Features

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