Open WebUI: Sign-in as another user via wildcard characters in the OAuth subject claim on SQLite

Summary On SQLite deployments, the lookup that maps an external identity to a local account does a substring match instead of an exact match. A subject value containing SQL wildcard characters therefore matches accounts the value was never issued for, and the sign-in binds to whichever account th...

CVE-2026-87999

creationtimestamp| type| source ---|---|--- 2026-09-10 16:35:21+00:00| published-proof-of-concept| https://github.com/open-webui/open-webui/security/advisories/GHSA-34r3-9m95-vq73...

CVE-2026-87998

creationtimestamp| type| source ---|---|--- 2026-09-10 16:35:19+00:00| published-proof-of-concept| https://github.com/open-webui/open-webui/security/advisories/GHSA-2724-6cpj-gf3v...

CVE-2026-87997

creationtimestamp| type| source ---|---|--- 2026-09-10 16:35:17+00:00| published-proof-of-concept| https://github.com/open-webui/open-webui/security/advisories/GHSA-3pf7-q2g3-wj28...

CVE-2026-87994

creationtimestamp| type| source ---|---|--- 2026-09-10 16:35:10+00:00| published-proof-of-concept| https://github.com/open-webui/open-webui/security/advisories/GHSA-fmqh-xp37-5hr8...

CVE-2026-87017

creationtimestamp| type| source ---|---|--- 2026-09-10 16:35:08+00:00| published-proof-of-concept| https://github.com/open-webui/open-webui/security/advisories/GHSA-pcvc-8vrv-8q6w...

CVE-2026-88005

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.9.0, Open WebUI's OAuth token exchange endpoint issues a session for a provider access token without applying the email domain allowlist that the normal OAuth login callback enforces. An accou...

CVE-2026-88006

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.11.1, Open WebUI's OAuth token exchange endpoint issues a session for a provider access token without running the OAuth role management that the normal OAuth login callback runs. A user whose...

EUVD-2026-75177

Open WebUI: Inaccessible knowledge bases are exposed through the built-in knowledge tool on most vector backends...

GHSA-PCVC-8VRV-8Q6W Open WebUI: Inaccessible knowledge bases are exposed through the built-in knowledge tool on most vector backends

Summary The built-in knowledge search tool returns knowledge bases the calling user has no access to. The tool works out which knowledge bases the caller may read and hands that set to the vector store as a search filter, and that filter is the only access control on the path. Most of the shipped...

Open WebUI: Inaccessible knowledge bases are exposed through the built-in knowledge tool on most vector backends

Summary The built-in knowledge search tool returns knowledge bases the calling user has no access to. The tool works out which knowledge bases the caller may read and hands that set to the vector store as a search filter, and that filter is the only access control on the path. Most of the shipped...

Incorrect Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Incorrect Authorization in the search process. An attacker can obtain unauthorized access to the identifier, name, and description of knowledge bases by exploiting improper filter application in certain vecto...

Missing Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Missing Authorization through the chat completions process. An attacker can overwrite another user's message content by submitting a crafted request to the endpoint, causing the original message to be replace...

Open WebUI: Channel members can overwrite another member's message via the chat completions endpoint

Summary Any member of a channel who can post to it could also replace the text of a message written by a different member. The channel branch of the chat completions endpoint checked that the caller may write to the channel, and that the targeted message belongs to that channel, but never checked...

EUVD-2026-75178

Open WebUI: Channel members can overwrite another member's message via the chat completions endpoint...

GHSA-FMQH-XP37-5HR8 Open WebUI: Channel members can overwrite another member's message via the chat completions endpoint

Summary Any member of a channel who can post to it could also replace the text of a message written by a different member. The channel branch of the chat completions endpoint checked that the caller may write to the channel, and that the targeted message belongs to that channel, but never checked...

EUVD-2026-75179

Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcoding allow-same-origin...

Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcoding allow-same-origin

Summary Any authenticated user with access to a shared terminal server could get script of their choosing to run in the Open WebUI origin itself. The in-app port preview rendered the content of a previewed port in an iframe whose sandbox always granted allow-same-origin alongside allow-scripts, a...

GHSA-JMC6-2WR8-H3WJ Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcoding allow-same-origin

Summary Any authenticated user with access to a shared terminal server could get script of their choosing to run in the Open WebUI origin itself. The in-app port preview rendered the content of a previewed port in an iframe whose sandbox always granted allow-same-origin alongside allow-scripts, a...

Improper Restriction of Rendered UI Layers or Frames

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Improper Restriction of Rendered UI Layers or Frames in the PortPreview process. An attacker can gain access to session tokens and take over user accounts by serving malicious scripts on a terminal server por...