CVE-2026-44292 — protobufjs: Prototype injection in generated message constructors

CVE-2026-44292

protobufjs: Prototype injection in generated message constructors PUBLISHED

Description (CNA)

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated message constructors copied enumerable properties from a provided properties object without filtering the __proto__ key. If an application constructed a message from an attacker-controlled plain object, an own enumerable __proto__ property could alter the prototype of that individual message instance. This vulnerability is fixed in 7.5.6 and 8.0.2.

Affected (CNA)

Vendor / product	Versions
protobufjs / protobuf.js	affected < 7.5.6; affected >= 8.0.0, < 8.0.2

CWE

CWE-1321

References

https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-fx83-v9x8-x52w

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.