EUVD-2026-97590

Open WebUI before 0.11.4 contains a stored cross-site scripting vulnerability in MarkdownInlineTokens.svelte, which renders markdown link URLs into anchor hrefs without validating their scheme. Authenticated users can embed javascript: links in shared chats that, when clicked by a victim, steal t...

CVE-2026-109287

Open WebUI versions 0.9.6 before 0.11.4 are vulnerable to an information disclosure flaw due to an authorization oversight. The application fails to verify that a supplied directory_id belongs to the requested knowledge base when accessing GET /api/v1/knowledge/{id}/files . An attacker with read ...

EUVD-2026-97589

Open WebUI from 0.9.6 before 0.11.4 contains an authorization flaw where the knowledge base file listing does not verify that a supplied directoryid belongs to the requested knowledge base. Users with read access to any knowledge base can supply a retained foreign directory UUID to GET...

CVE-2026-109287 Open WebUI 0.9.6 before 0.11.4 Information Disclosure via Unscoped Directory ID

Open WebUI from 0.9.6 before 0.11.4 contains an authorization flaw where the knowledge base file listing does not verify that a supplied directoryid belongs to the requested knowledge base. Users with read access to any knowledge base can supply a retained foreign directory UUID to GET...

CVE-2026-109287 Open WebUI 0.9.6 before 0.11.4 Information Disclosure via Unscoped Directory ID

Open WebUI from 0.9.6 before 0.11.4 contains an authorization flaw where the knowledge base file listing does not verify that a supplied directoryid belongs to the requested knowledge base. Users with read access to any knowledge base can supply a retained foreign directory UUID to GET...

CVE-2026-109286 Open WebUI 0.7.0 before 0.11.4 Session Token Theft via SyncStatsModal

Open WebUI from 0.7.0 before 0.11.4 contains a cross-origin message handling vulnerability in SyncStatsModal that allows any website to steal a signed-in user's session token by posting unvalidated verify:chat messages. Attackers can supply a path-traversal chat id redirecting the authenticated...

CVE-2026-109286 Open WebUI 0.7.0 before 0.11.4 Session Token Theft via SyncStatsModal

Open WebUI from 0.7.0 before 0.11.4 contains a cross-origin message handling vulnerability in SyncStatsModal that allows any website to steal a signed-in user's session token by posting unvalidated verify:chat messages. Attackers can supply a path-traversal chat id redirecting the authenticated...

CVE-2026-109286

Versions of Open WebUI from 0.7.0 before 0.11.4 are vulnerable to a cross-origin message handling flaw in the SyncStatsModal component. This vulnerability, categorized as an Origin Validation Error (CWE-346) , allows an attacker-controlled website to steal a signed-in user's session token by post...

EUVD-2026-97588

Open WebUI from 0.7.0 before 0.11.4 contains a cross-origin message handling vulnerability in SyncStatsModal that allows any website to steal a signed-in user's session token by posting unvalidated verify:chat messages. Attackers can supply a path-traversal chat id redirecting the authenticated...

CVE-2026-109285

Open WebUI versions 0.6.0 before 0.11.4 are vulnerable to an improper access control flaw within the has_access_to_file function. The root cause is the retention of stale cached knowledge base references , which allows former collaborators to maintain unauthorized access to files. An attacker wit...

CVE-2026-109285 Open WebUI 0.6.0 before 0.11.4 Improper Access Control via Stale File Metadata

Open WebUI from 0.6.0 before 0.11.4 contains an improper access control vulnerability in hasaccesstofile that lets former knowledge base collaborators keep file access via stale cached knowledge base references. Attackers with read or write grants can download removed files through the file conte...

CVE-2026-109285 Open WebUI 0.6.0 before 0.11.4 Improper Access Control via Stale File Metadata

Open WebUI from 0.6.0 before 0.11.4 contains an improper access control vulnerability in hasaccesstofile that lets former knowledge base collaborators keep file access via stale cached knowledge base references. Attackers with read or write grants can download removed files through the file conte...

EUVD-2026-97587

Open WebUI from 0.6.0 before 0.11.4 contains an improper access control vulnerability in hasaccesstofile that lets former knowledge base collaborators keep file access via stale cached knowledge base references. Attackers with read or write grants can download removed files through the file conte...

EUVD-2026-97586

Open WebUI from 0.11.0 before 0.11.4 contains an improper authorization vulnerability in the chat fork handler, which places forked chats in the source chat's folder without checking folder write access. Shared folder members downgraded to read-only can call POST /api/v1/chats/id/fork on chats th...

CVE-2026-109284

Open WebUI versions 0.11.0 before 0.11.4 are vulnerable to an improper authorization flaw in the chat fork handler. The application fails to verify folder write permissions when placing forked chats into a source chat's folder. Specifically, shared folder members who have been downgraded to read-...

CVE-2026-109283

Open WebUI versions 0.11.1 before 0.11.4 are vulnerable to an authorization bypass in the OAuth token exchange endpoint. The flaw occurs because the system only reads role claims from the provider's userinfo response and retains the user's existing role if no new claim is found, failing to accoun...

CVE-2026-109284 Open WebUI 0.11.0 before 0.11.4 Improper Authorization via Chat Fork Endpoint

Open WebUI from 0.11.0 before 0.11.4 contains an improper authorization vulnerability in the chat fork handler, which places forked chats in the source chat's folder without checking folder write access. Shared folder members downgraded to read-only can call POST /api/v1/chats/id/fork on chats th...

CVE-2026-109283 Open WebUI 0.11.1 before 0.11.4 Authorization Bypass via OAuth Token Exchange

Open WebUI from 0.11.1 before 0.11.4 contains an authorization bypass in the OAuth token exchange endpoint, which reads role claims only from the provider's userinfo response and keeps the user's existing role when no roles claim is found, ignoring roles sent only in the ID token. Users with a...

EUVD-2026-97585

Open WebUI from 0.11.1 before 0.11.4 contains an authorization bypass in the OAuth token exchange endpoint, which reads role claims only from the provider's userinfo response and keeps the user's existing role when no roles claim is found, ignoring roles sent only in the ID token. Users with a...

CVE-2026-109283 Open WebUI 0.11.1 before 0.11.4 Authorization Bypass via OAuth Token Exchange

Open WebUI from 0.11.1 before 0.11.4 contains an authorization bypass in the OAuth token exchange endpoint, which reads role claims only from the provider's userinfo response and keeps the user's existing role when no roles claim is found, ignoring roles sent only in the ID token. Users with a...