CVE-2026-45396

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, the POST /api/v1/evaluations/feedback endpoint in Open WebUI v0.9.2 is vulnerable to mass assignment via FeedbackForm, which uses model_config = ConfigDict(extra='allow'). Due to an insecure dictionary merge order in insert_new_feedback(), an authenticated attacker can inject a user_id field in the request body that overwrites the server-derived value, creating feedback records attributed to any arbitrary user. This corrupts the model evaluation leaderboard (Elo ratings) and enables identity spoofing. This vulnerability is fixed in 0.9.5.

• CWE-915

• https://github.com/open-webui/open-webui/security/advisories/GHSA-rjmp-vjf2-qf4gExploit, Vendor Advisory
• https://github.com/open-webui/open-webui/security/advisories/GHSA-rjmp-vjf2-qf4gExploit, Vendor Advisory

Published

May 15, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-4539A security flaw has been discovered in pygments up to 2.19.2…3.3
• CVE-2026-45390In OCaml-tar before 3.4.0, a crafted archive with ../ path s…9.1
• CVE-2026-45391A command injection vulnerability in Cribl Edge for Linux ve…8.5
• CVE-2026-45392DOM-based cross-site scripting (XSS) in Cribl Stream before …8.7
• CVE-2026-45393A vulnerability chain in Cribl Edge for Windows before 4.17.…8.5
• CVE-2026-45395Open WebUI is a self-hosted artificial intelligence platform…7.2
• CVE-2026-45397Open WebUI is a self-hosted artificial intelligence platform…5.3
• CVE-2026-45398Open WebUI is a self-hosted artificial intelligence platform…7.5
• CVE-2026-45399Open WebUI is a self-hosted artificial intelligence platform…7.1
• CVE-2026-4540A vulnerability was detected in projectworlds Online Notes S…7.3
• CVE-2026-45400Open WebUI is a self-hosted artificial intelligence platform…8.5
• CVE-2026-45401Open WebUI is a self-hosted artificial intelligence platform…8.5