CVE-2026-44291
HIGHprotobufjs: Code generation gadget after prototype pollution
Title source: cnaExploitation Summary
EIP tracks 1 public exploit for CVE-2026-44291. PoCs published by HORKimhab.
AI-analyzed exploit summary The repository contains only a template structure with no actual exploit code or technical details. It includes placeholder files and a generic README with legal disclaimers but lacks any functional PoC or vulnerability analysis.
Description
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.
Exploits (1)
The repository contains only a template structure with no actual exploit code or technical details. It includes placeholder files and a generic README with legal disclaimers but lacks any functional PoC or vulnerability analysis.
References (1)
Scores
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H