CVE-2026-44292

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.

PUBLISHED Reserved 2026-05-05 | Published 2026-05-13 | Updated 2026-05-18 | Assigner GitHub_M

Problem types

CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Product status

References

github.com/...buf.js/security/advisories/GHSA-fx83-v9x8-x52w

cve.org (CVE-2026-44292)

nvd.nist.gov (CVE-2026-44292)

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