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-2026-67924

Summary Open WebUI vetted user-supplied URLs by resolving the hostname once and rejecting private, loopback and link-local addresses, then let the HTTP client resolve that hostname again at connect time. An attacker who controls the authoritative DNS for a hostname they submit can answer with a...

PT-2026-67933

Summary With the Playwright web loader enabled, Open WebUI opens user-submitted URLs in a real browser and validates the destination address before allowing the request. That check only ran for the top-level page request. Every other request the page issued was passed through unvalidated, so a pa...

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-2026-67833

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.6.34 through 0.10.x Description Open WebUI renders vega and vega-lite fenced code blocks in chat content by building a Vega view in the viewer's browser without a restricted resource loader. This allows a user to place a...

PT-2026-67834

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.5.0 through 0.10.9 Description In standard channels, the message update and delete handlers fail to verify if the caller is the original author of the message. Since write access is the same permission required to post a...

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...

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...

CVE-2026-70487: Missing Authorization

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.8 until 0.11.0, inline direct model metadata accepted client-supplied knowledge attachments without filtering them against the caller's read access. Any authenticated user who knew another user's file i...

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-2026-70489: Uncontrolled Resource Consumption

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.0, automation recurrence parsing in backend/openwebui/utils/automations.py anchored minutely and hourly rules at a fixed date of 2000-01-01 and then walked forward one interval at a time to...

CVE-2026-70490: Incorrect Authorization

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.8 until 0.11.0, the terminal WebSocket route in backend/openwebui/routers/terminals.py authenticated its own first-message JWT and never applied the verified-user role gate that getverifieduser enforces...

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-2026-70492: Improper Neutralization of Input During Web Page Generation

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.0, src/lib/components/chat/Messages/Markdown/KatexRenderer.svelte could store and render a chat message whose math block makes KaTeX fail with a stack overflow instead of a parse error. Th...

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...

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-2026-70481: Improper Access Control

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.0, the standard channel message update and delete handlers accepted any caller holding write access on the channel without checking that the caller wrote the message. Because write access i...

CVE-2026-70482: Improper Authentication

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.11.0, when ENABLEOAUTHTOKENEXCHANGE=True, /oauth/provider/token/exchange accepts a raw provider access token and validates it by calling the provider userinfo endpoint without confirming which...

CVE-2026-70484: Missing Authorization

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.7.0 until 0.11.0, the legacy chat-completions features block trusted a client-supplied imagegeneration flag and did not re-check the features.imagegeneration permission that the direct image routes and...

CVE-2026-70485: Server-Side Request Forgery (SSRF)

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.0, Open WebUI checked whether a user-supplied URL destination was globally routable by applying ipaddress.isglobal to the literal IPv6 address without examining IPv4 addresses embedded in...