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...

PT-2026-59397

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

PT-2026-41191

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.9.5 Description An authenticated attacker can perform mass assignment via the 'POST /api/v1/evaluations/feedback' endpoint. This is possible because the FeedbackForm uses a configuration that allows extra fields,...