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Medium severity5.3GHSA Advisory· Published Jun 22, 2026· Updated Jun 24, 2026

CVE-2026-54269

CVE-2026-54269

Description

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
protobufjsnpm
< 7.6.37.6.3
protobufjs-clinpm
>= 2.0.0, < 2.5.12.5.1
protobufjs-clinpm
< 1.3.31.3.3
protobufjsnpm
>= 8.0.0, < 8.6.08.6.0

Affected products

33

Patches

Vulnerability mechanics

References

3

News mentions

0

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