Open WebUI: Mass Assignment via FeedbackForm extra=allow Allows Feedback User ID Spoofing and Evaluation Data Manipulation

Mass Assignment in Feedback Creation Allows User ID Spoofing and Evaluation Data Manipulation SummaryThe POST /api/v1/evaluations/feedback endpoint in Open WebUI v0.9.2 is vulnerable to mass assignment via FeedbackForm, which uses modelconfig = ConfigDictextra='allow'. Due to an insecure dictiona...

CVE-2026-45396

Summary of technical details (CVE-2026-45396) Open WebUI v0.9.2 is vulnerable to mass assignment in the endpoint POST /api/v1/evaluations/feedback through a FeedbackForm that uses extra='allow'. The root cause is an insecure dictionary merge order in insert_new_feedback(), where the form data can...