CVE-2026-44291
CVE-2026-44291 · protobufjs: Code generation gadget after prototype pollution
This page contains facts from public vulnerability sources. Check the original advisory before updating.
protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs used plain objects with inherited prototypes for internal type lookup tables used by generated encode and decode functions. If Object.prototype had already been polluted, those lookup tables could resolve attacker-controlled inherited properties as valid protobuf type information. This could cause attacker-controlled strings to be emitted into generated JavaScript code. This vulnerability is fixed in 7.5.6 and 8.0.2.
CVSS 8.1 · High · EPSS 0.5% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
protobuf.js
- Versions
- < 7.5.6: Affected
- >= 8.0.0, < 8.0.2: Affected
No fix published
protobufjs npm
- Affected ranges
- SEMVER: < 7.5.6
Update to 7.5.6
protobufjs npm
- Affected ranges
- SEMVER: ≥ 8.0.0, < 8.0.2
Update to 8.0.2