{"id":78521,"date":"2026-05-16T00:03:47","date_gmt":"2026-05-15T20:33:47","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-45396-open-webui-mass-assignment-via-feedbackform-extraallow-allows-feedback-user-id-spoofing-and-evaluation-data-manipulation\/"},"modified":"2026-05-16T00:03:47","modified_gmt":"2026-05-15T20:33:47","slug":"cve-2026-45396-open-webui-mass-assignment-via-feedbackform-extraallow-allows-feedback-user-id-spoofing-and-evaluation-data-manipulation","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-45396-open-webui-mass-assignment-via-feedbackform-extraallow-allows-feedback-user-id-spoofing-and-evaluation-data-manipulation\/","title":{"rendered":"CVE-2026-45396 &#8211; Open WebUI: Mass Assignment via FeedbackForm extra=allow Allows Feedback User ID Spoofing and Evaluation Data Manipulation"},"content":{"rendered":"<p>CVE ID :CVE-2026-45396<\/p>\n<p>  Published : May 15, 2026, 8:33 p.m. | 24\u00a0minutes ago<\/p>\n<p>  Description :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=&#8217;allow&#8217;). 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.<\/p>\n<p>  Severity: 0.0 | NA<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-45396 Published : May 15, 2026, 8:33 p.m. | 24\u00a0minutes ago Description :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=&#8217;allow&#8217;). Due to an insecure dictionary &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-78521","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/78521","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=78521"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/78521\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=78521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=78521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=78521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}