CVE-2026-87013 Open WebUI: Any authenticated user can start a non-terminating request via a folder parent cycle

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/v1/folders/id/update/parent allowed a user to place a folder under itself or one of its descendants, while the folder tree walks used by DELETE /api/v1/folders/id and POST...

CVE-2026-87013

Open WebUI versions 0.10.0 through 0.11.1 contain a denial-of-service vulnerability in the folder tree functionality. The POST /api/v1/folders/{id}/update/parent endpoint allowed an authenticated user to place a folder under itself or one of its descendants, creating a parent cycle . Because the ...

CVE-2026-87013 Open WebUI: Any authenticated user can start a non-terminating request via a folder parent cycle

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/v1/folders/id/update/parent allowed a user to place a folder under itself or one of its descendants, while the folder tree walks used by DELETE /api/v1/folders/id and POST...

CVE-2026-87012 Open WebUI: Any authenticated user can suppress calendar alerts instance-wide via a non-numeric alert value

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, backend/openwebui/models/calendar.py stored the calendar event meta.alertminutes value without type validation and the shared upcoming-event scheduler compared that value numerically. An...

CVE-2026-87012

Open WebUI (a self-hosted AI platform) is affected in versions 0.9.0 through 0.11.1 by a type-validation flaw in backend/open_webui/models/calendar.py. The meta.alert_minutes field was stored without type validation while the shared upcoming-event scheduler compared it numerically. An authenticat...

CVE-2026-87012 Open WebUI: Any authenticated user can suppress calendar alerts instance-wide via a non-numeric alert value

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, backend/openwebui/models/calendar.py stored the calendar event meta.alertminutes value without type validation and the shared upcoming-event scheduler compared that value numerically. An...

CVE-2026-87012 Open WebUI: Any authenticated user can suppress calendar alerts instance-wide via a non-numeric alert value

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, backend/openwebui/models/calendar.py stored the calendar event meta.alertminutes value without type validation and the shared upcoming-event scheduler compared that value numerically. An...

CVE-2026-87011 Open WebUI: Unauthenticated requests can stall the server via uncached OIDC fetches in back-channel logout

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, the unauthenticated POST /oauth/backchannel-logout handler in backend/openwebui/utils/oauth.py fetched the OIDC discovery document and signing keys before validating a submitted logout...

CVE-2026-87011

Open WebUI , a self-hosted AI platform, contains a denial-of-service vulnerability in the unauthenticated POST /oauth/backchannel-logout handler (backend/open_webui/utils/oauth.py). From version 0.9.0 through 0.11.1 , the handler fetched the OIDC discovery document and signing keys before validat...

CVE-2026-87011 Open WebUI: Unauthenticated requests can stall the server via uncached OIDC fetches in back-channel logout

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, the unauthenticated POST /oauth/backchannel-logout handler in backend/openwebui/utils/oauth.py fetched the OIDC discovery document and signing keys before validating a submitted logout...

CVE-2026-87011 Open WebUI: Unauthenticated requests can stall the server via uncached OIDC fetches in back-channel logout

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, the unauthenticated POST /oauth/backchannel-logout handler in backend/openwebui/utils/oauth.py fetched the OIDC discovery document and signing keys before validating a submitted logout...

PT-2026-89173

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.9.6 through 0.11.0 Description An issue exists in the SafePlaywrightURLLoader component within backend/open webui/retrieval/web/utils.py affecting both sync and async request interceptors. The system validates a...

PT-2026-89172

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.8.11 through 0.11.0 Description An issue exists where the in-app port preview renders content in an iframe sandbox that simultaneously grants allow-scripts and allow-same-origin. Because the terminal proxy serves this...

PT-2026-89162

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.6.27 through 0.11.0 Description An issue exists in the tool loading routine within backend/open webui/utils/tools.py where a cookie jar is captured from the enclosing connection loop instead of being bound to each externa...

PT-2026-89176

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.11.1 Description An issue exists where the platform incorrectly identifies certain internal addresses as external by relying solely on Python's globally routable address classification. This allows an authenticat...

PT-2026-89171

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.9.5 through 0.11.0 Description An issue exists in the channel branch of the chat completions handler where the system verifies if a user has write access to a channel and if a specific message belongs to that channel, but...

PT-2026-89167

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.6.41 through 0.11.0 Description On SQLite deployments, the lookup process mapping an external identity to a local account performs a substring match instead of an exact match. This occurs because the contains operator on...

PT-2026-89177

Summary Chat histories are stored as an unvalidated JSON object. After a message is deleted, the code that picks the chat's new current message walked down the childrenIds links without recording where it had already been. Any account with the default user role could store a chat whose messages...

PT-2026-89175

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.10.0 through 0.11.0 Description An issue exists in the knowledge base delete handler where a non-administrator user with write access to an external knowledge base can delete the shared instance configuration. This occurs...

CVE-2026-87015: Insertion of Sensitive Information Into Sent Data

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.27 until 0.11.1, backend/openwebui/utils/tools.py captured a cookie jar from the enclosing connection loop instead of binding it to each external tool callable. When multiple tool servers were attached...