CVE-2026-44294: protobuf.js: Denial of service from crafted field names in generated code

May 12, 2026 (updated May 14, 2026)

protobufjs generated JavaScript property accessors from schema-controlled field and oneof names. Certain control characters in field names were not escaped before being embedded into generated function bodies. A crafted schema or JSON descriptor could therefore cause generated encode, decode, verify, or conversion functions to fail during compilation.

References

github.com/advisories/GHSA-2pr8-phx7-x9h3
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-2pr8-phx7-x9h3
nvd.nist.gov/vuln/detail/CVE-2026-44294

Code Behaviors & Features

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