CVE-2026-70493: Inefficient Regular Expression Complexity

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, the built-in knowledge search path in backend/openwebui/tools/knowledgefs.py and backend/openwebui/tools/builtin.py let a chat participant choose a pattern used to grep knowledge files...

PT-2026-67836

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.9.6 through 0.10.2 Description An issue exists where the DELETE /api/v1/chats/id endpoint cancels in-flight tasks before verifying if the caller has the necessary permissions to delete the chat. An authenticated user who...

PT-2026-67837

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.7.0 through 0.10.0 Description An authenticated user whose features.image generation permission has been revoked can still trigger image generation by sending a feature flag in a chat-completion request. The server fails ...

PT-2026-67838

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.9.0 through 0.10.0 Description Open WebUI fails to properly validate user-supplied URLs when checking if a destination is globally routable. The system applies ipaddress.is global to literal IPv6 addresses but does not...

PT-2026-67839

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.9.0 through 0.10.2 Description An issue exists where the terminal file-preview serveUrl iframe branch grants allow-same-origin and allow-scripts permissions for HTML files served from the application origin. This occurs...

PT-2026-67844

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.11.0 Description An authenticated attacker can bypass URL validation to perform a DNS rebinding attack. The software validates hostnames by resolving them once to reject private, loopback, and link-local addresse...

PT-2026-67846

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.8.8 through 0.10.2 Description An issue exists where inline direct model metadata accepts client-supplied knowledge attachments without verifying the caller's read access. This occurs when a client defines a model inline...

PT-2026-67859

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.11.0 Description Authenticated non-admin users with read-only access can obtain the full Python source code of server-side tools shared with them. This occurs because the response models permitted extra fields,...

CVE-2026-70479: Server-Side Request Forgery (SSRF)

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, with WEBLOADERENGINE=playwright, the Playwright web loader validates only the top-level page request and lets sub-resource requests pass unvalidated. A page supplied by an authenticated...

CVE-2026-70486: Improper Neutralization of Input During Web Page Generation

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.0, the terminal file-preview serveUrl iframe branch always granted allow-same-origin together with allow-scripts for HTML files served from the application origin. Any authenticated user wi...

CVE-2026-70488: Authorization Bypass Through User-Controlled Key

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, the sync cleanup endpoint authorized write access to the knowledge base in the URL but then acted on directory and file ids supplied in the request body without checking that those objec...

CVE-2026-70491: Exposure of Sensitive Information to an Unauthorized Actor

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. In 0.10.2 and earlier, the GET /api/v1/tools/, GET /api/v1/tools/list, and GET /api/v1/tools/id/id endpoints in backend/openwebui/routers/tools.py returned full Python tool source to authenticated non-admin...

CVE-2026-54020: Time-of-check Time-of-use (TOCTOU) Race Condition

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.0, Open WebUI resolved a hostname during URL validation and rejected private, loopback, and link-local addresses, but the HTTP clients resolved the hostname again at connection time. An authenticat...

PT-2026-67926

Summary A user with write access to one knowledge base could delete directories, and drop file embeddings, belonging to knowledge bases they do not control. The sync cleanup endpoint verified write access on the knowledge base named in the URL and then acted on the directory and file ids supplied...

PT-2026-67862

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.10.0 through 0.10.9 Description A flaw in the DELETE /api/v1/folders/id endpoint allows a user with write access to a shared chat folder to permanently delete chats and messages belonging to the folder owner. This occurs...

PT-2026-67903

Summary A workspace tool shared with a read grant returned its full Python source to the recipient. Any authenticated non-admin who could use a shared tool could also read its source, including any user on the instance when a tool was shared publicly. Source is meant to be a writer-only tier: the...

PT-2026-67915

Summary Open WebUI fetches user-supplied URLs on the server for RAG URL ingestion, URL-to-markdown conversion and web-search content retrieval, and decides whether a destination is allowed by asking whether its IP address is globally routable. That test operates on the literal IPv6 address and do...

Chromium: CVE-2026-17888 Insufficient validation of untrusted input in WebUI

This CVE was assigned by Chrome. Microsoft Edge Chromium-based ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information...

CVE-2026-17888

An insufficient validation of untrusted input flaw was found in the WebUI component of the Chromium browser. Upstream bugs: https://code.google.com/p/chromium/issues/detail?id=523720529...

SUSE CVE-2026-17888

Insufficient validation of untrusted input in WebUI in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to potentially perform a sandbox escape via malicious network traffic. Chromium security severity: Medium...