Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Protobufjs Project | Protobufjs | < 7.5.6 |
Related Weaknesses (CWE)
References
- https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-fx83-v9x8-x52Vendor AdvisoryMitigation
FAQ
What is CVE-2026-44292?
CVE-2026-44292 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 obj...
How severe is CVE-2026-44292?
CVE-2026-44292 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44292?
Check the references section above for vendor advisories and patch information. Affected products include: Protobufjs Project Protobufjs.