CVE-2026-54269
CVE-2026-54269 · protobufjs: Schema-derived names can shadow runtime-significant properties
This page contains facts from public vulnerability sources. Check the original advisory before updating.
protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 8.6.0 and 7.6.3, protobufjs accepted certain schema-derived names that could collide with properties used by protobufjs runtime helpers. The known affected names are fields named hasOwnProperty, field or oneof names such as $type when loaded through protobufjs JSON/reflection descriptors, and service methods whose generated helper name is rpcCall. When affected message or service types were used, protobufjs could read schema-controlled data where it expected an own-property helper, reflected type metadata, or the base RPC helper. This could cause deterministic exceptions or recursive calls in affected decode post-checks, verification, object conversion, reflected JSON serialization, or protobufjs RPC helper invocation. This vulnerability is fixed in 8.6.0 and 7.6.3.
CVSS 5.3 · Medium · EPSS 0.4% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
protobuf.js
- Versions
- < 7.6.3: Affected
- >= 8.0.0, < 8.6.0: Affected
No fix published
protobufjs npm
- Affected ranges
- SEMVER: < 7.6.3
Update to 7.6.3
protobufjs-cli npm
- Affected ranges
- SEMVER: ≥ 2.0.0, < 2.5.1
Update to 2.5.1
protobufjs-cli npm
- Affected ranges
- SEMVER: < 1.3.3
Update to 1.3.3
protobufjs npm
- Affected ranges
- SEMVER: ≥ 8.0.0, < 8.6.0
Update to 8.6.0