PT-2026-89162

Summary When more than one external tool server is reachable in the same request, a tool call to a server configured for bearer authentication can arrive carrying the calling user's Open WebUI session cookies alongside that server's own key. The cookie jar is built per connection, but the callabl...

Linux Distros Unpatched Vulnerability : CVE-2026-87506

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Privilege elevation in WebUI in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to potentially execute...

PT-2026-89175

Summary External knowledge connections are created and owned by administrators, and are shared by every external knowledge base bound to them. Deleting an external knowledge base also removed that connection from the instance configuration, with no check on the caller's role and no check for othe...

PT-2026-89178

Summary Open WebUI protects server-side web fetches with two controls: the operator's list of excluded hosts, and a check that refuses private and internal addresses. Neither control was applied to the destination of an HTTP redirect. On a deployment where redirect following is enabled, any...

PT-2026-89167

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...

PT-2026-89168

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...

PT-2026-89171

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...

PT-2026-89172

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...

PT-2026-89173

Summary With the Playwright web loader enabled, Open WebUI checks the address behind a user-submitted URL before allowing the request, then handed the request to the browser to perform. The browser resolved the hostname a second time, on its own, and that answer was never checked. An attacker who...

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-2026-89179

Summary Chat histories are stored as an unvalidated JSON object. The walk that reconstructs a chat's message chain detected repeats using each message's own id field while moving through the history by map key, so a message that simply omitted id was never recorded as visited. A history whose...

Linux Distros Unpatched Vulnerability : CVE-2026-87584

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Incorrect authorization in WebUI in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass system access restrictions into a privileged page v...

Linux Distros Unpatched Vulnerability : CVE-2026-87498

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Missing authorization in WebUI in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass web origin...

PT-2026-89161

Summary A user who is demoted from admin by an identity provider keeps admin-level read and write access to every user's notes, over any Socket.IO connection that was already open when the demotion happened. Open WebUI caches the user's role on the socket at connection time, and the two SSO...

PT-2026-89158

Summary The OIDC back-channel logout endpoint is unauthenticated by design, because the identity provider calls it without a browser session. Before checking whether the submitted logout token was genuine, the handler fetched the provider's discovery document and its signing keys over the network...

GHSA-XRQW-3RRV-VX5W vulnerabilities

Vulnerabilities for packages: open-webui...

CVE-2026-71428 vulnerabilities

Vulnerabilities for packages: open-webui...

CVE-2026-9856 vulnerabilities

Vulnerabilities for packages: open-webui...

GHSA-4MVJ-M6J5-PMF7 vulnerabilities

Vulnerabilities for packages: open-webui...

PT-2026-88598

Missing authorization in WebUI in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. Chromium security severity: High...