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...

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-2026-109283 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...

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-...

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-2026-109284 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...

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...

CVE-2026-109286: Origin Validation Error

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...

PT-2026-110703

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.7.0 through 0.11.3 Description A cross-origin message handling issue exists in the SyncStatsModal component. This allows an external website to steal a signed-in user's session token by sending unvalidated verify:chat...

CVE-2026-109283: Incorrect Authorization

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...

PT-2026-110700

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.11.1 through 0.11.3 Description An authorization bypass exists in the OAuth token exchange process. The system reads role claims exclusively from the provider's userinfo response and retains the user's current role if no...

CVE-2026-109572: Missing Authorization

Open WebUI from 0.8.6 before 0.11.4 contains a privilege escalation vulnerability in the terminal proxy that allows authenticated users to reach the Terminals administrator API with the shared key attached. Attackers can send requests through /api/v1/terminals/serverid/path to list or stop other...

PT-2026-110713

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.11.4 Description Authenticated users can access disabled model provider backends by providing an explicit backend index. This occurs on Ollama and OpenAI-compatible listing routes, where the index can be passed a...

PT-2026-110707

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.11.1 through 0.11.3 Description Authenticated users can execute scripts by uploading crafted DOCX attachments. The issue resides in DocxPreview.svelte and occurs when attackers embed an OOXML altChunk HTML part or a...

PT-2026-110705

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.11.4 Description A stored cross-site scripting issue exists in the MarkdownInlineTokens.svelte component. The software renders markdown link URLs into anchor hrefs without validating the URL scheme. This allows...

PT-2026-110710

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.11.0 through 0.11.3 Description Authenticated non-admin users with tool export permission can obtain the full Python source code of tools shared with them in read-only mode. This occurs when requesting the 'GET...

CVE-2026-109293: Exposure of Sensitive Information to an Unauthorized Actor

Open WebUI from 0.11.0 before 0.11.4 contains an information disclosure vulnerability that allows authenticated non-admin users with tool export permission to obtain tool source code shared with them read-only. Attackers can request GET /api/v1/tools/export to retrieve the full Python source of...

CVE-2026-109294: Uncontrolled Resource Consumption

Open WebUI from 0.6.42 before 0.11.4 contains an uncontrolled resource consumption vulnerability that allows authenticated users to exhaust server memory by supplying compressed remote image URLs in chat messages. Attackers can point the image field at a host returning gzip-encoded responses, whi...