protobufjs: Prototype injection in generated message constructors_CVE-2026-44292

5.3 / 10

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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.

Basic Information

ID CVE-2026-44292

Source GitHub_M

Published May 13, 2026 at 14:42

Affected Product

Vendor protobufjs

Product protobuf.js

Version < 7.5.6

Affected Versions protobufjs protobuf.js < 7.5.6
protobufjs protobuf.js >= 8.0.0, < 8.0.2

CWE Classification

CWE-1321

References

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

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    "published": "2026-05-13T14:42:55.155Z",
    "modified": "2026-05-13T14:42:55.155Z",
    "type": "cve",
    "title": "protobufjs: Prototype injection in generated message constructors",
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