CVE-2026-44564: Incorrect Authorization

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the ydoc:document:update Socket.IO event handler checks whether the sender is a member of the document's Socket.IO room line 678 but does not verify that the sender has write...

CVE-2026-45402: Authorization Bypass Through User-Controlled Key

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, multiple endpoints accept a user-supplied fileid and attach the referenced file to a resource the caller controls folder knowledge, knowledge-base contents without verifying that the...

Open WebUI security vulnerabilities

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted WebUI under the open source Open WebUI project. Versions of Open WebUI prior to 0.9.5 contained security vulnerabilities. These vulnerabilities stemmed from the POST /api/v1/evaluations/feedback endpoint, which had a batch...

CVE-2026-45395: Improper Privilege Management

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, the tool update endpoint POST /api/v1/tools/id/id/update is missing the workspace.tools permission check that is present on the tool create endpoint. This allows a user who has been...

Open WebUI security vulnerabilities

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted WebUI under open source. Versions of Open WebUI prior to 0.9.5 contained security vulnerabilities. These vulnerabilities stemmed from multiple endpoints accepting file IDs provided by users without verifying ownership,...

Open WebUI security vulnerabilities

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted WebUI based on the open-source Open WebUI framework. Versions of Open WebUI prior to 0.9.0 contained security vulnerabilities. These vulnerabilities stemmed from the ydoc:document:update Socket.IO event handler, which checke...

Open WebUI input validation error vulnerability

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted WebUI under open source. Prior to Open WebUI 0.9.3, there was a vulnerability related to input validation errors. This vulnerability stemmed from the image upload feature’s cross-site request forgeing mechanism, which could...

CVE-2026-45349: Authorization Bypass Through User-Controlled Key

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, a user just needs to use the API endpoint: /api/chat/completions with their own API key generated in OWUI and the Chat ID of another user to continue the conversation of the other...

Open WebUI security vulnerabilities

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted WebUI under open source. Versions of Open WebUI prior to 0.9.0 contained security vulnerabilities. These vulnerabilities stemmed from the ability for users to continue a conversation with another user through...

CVE-2026-44558: Missing Authorization

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the channel router does not call filterallowedaccessgrants on either create or update paths. A non-admin user who can create group channels or who owns a channel can submit arbitrary...

Open WebUI security vulnerabilities

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted WebUI under open source. Versions of Open WebUI prior to 0.9.5 contained security vulnerabilities. These vulnerabilities stemmed from a lack of workspace.tools permission checks at the tool update endpoint, which could allow...

Open WebUI security vulnerabilities

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted WebUI under open source. Versions of Open WebUI prior to 0.9.0 contained security vulnerabilities. These vulnerabilities stemmed from the validatecollectionaccess function using an incomplete list of allowed collections. Onl...

Open WebUI security vulnerabilities

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted WebUI under open source. Versions of Open WebUI prior to 0.9.0 contained security vulnerabilities. These vulnerabilities stemmed from the router not calling filterallowedaccessgrants during path creation or updates...

Open WebUI Authorization Issue Vulnerability

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted WebUI based on the Open WebUI open source project. Versions of Open WebUI prior to 0.9.0 had an authorization vulnerability. This vulnerability stemmed from the LDAP authentication endpoint failing to verify that the submitt...

CVE-2026-44566: Improper Limitation of a Pathname to a Restricted Directory

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.1.124, when attaching files to a promp, the name of the file is derived from the original HTTP upload request and is not validated or sanitized. This allows for users to upload files with...

CVE-2026-44563: Missing Authorization

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the /api/generate, /api/embed, /api/embeddings, and /api/show endpoints accept any model name from the user and forward the request to the Ollama backend without checking whether the...

CVE-2026-45675: Improper Privilege Management

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the LDAP and OAuth authentication flows use a TOCTOU Time-of-Check-Time-of-Use pattern for first-user admin role assignment. The regular signup handler signuphandler in auths.py, lin...

CVE-2026-45385: Authorization Bypass Through User-Controlled Key

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, an IDOR vulnerability exists in the Channels feature of Open WebUI, allowing any channel member to modify messages sent by other members including administrators within the same...

CVE-2026-45398: Authorization Bypass Through User-Controlled Key

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, validatecollectionaccess checks the user-memory- and file- collection name prefixes but does not check knowledge base collections, which use raw UUIDs as collection names. Any...

CVE-2026-45665: Improper Neutralization of Input During Web Page Generation

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.0, a Stored Cross-Site Scripting XSS vulnerability exists in the Banner component due to an improper sanitization order specifically, DOMPurify is executed before the marked library. Th...