CVE-2026-45303

Open WebUI vulnerability CVE-2026-45303: Stored XSS via the HTML rendering view affects Open WebUI prior to 0.6.5. The frontend renders chat HTML inside an iframe with sandbox=

CVE-2026-45346

Open WebUI (self-hosted offline AI platform) prior to version 0.6.31 contains a stored Cross‑Site Scripting (XSS) vulnerability in its SVG renderer. The issue allows attackers to save and execute injected HTML/JavaScript in the application context, potentially leading to data exposure or manipula...

CVE-2026-45315

Open WebUI (self-hosted offline AI platform) is affected by CVE-2026-45315. Before version 0.9.3, the audio transcription upload endpoint accepts a user-supplied filename extension and saves the file under CACHE_DIR/audio/transcriptions, then serves /cache/{path} via FileResponse using the on-dis...

CVE-2026-59224

Open WebUI vulnerability CVE-2026-59224 affects versions prior to 0.10.0. The issue: in backend/open_webui/routers/terminals.py, the ws_terminal upstream URL is built from an unencoded session_id and appends user_id as a query parameter, enabling query injection to make the terminal backend resol...

CVE-2026-26192

Open WebUI (self-hosted offline) before v0.7.0 allows stored XSS via a crafted document payload by modifying chat history to set html in document metadata; the frontend treats contents as HTML and renders in an iframe during citation preview or shared chat view. Version 0.7.0 fixes the issue. No ...

CVE-2026-54006

Open WebUI prior to version 0.9.6 is vulnerable to an IDOR in the calendar events update endpoint. The vulnerability arises because POST /api/v1/calendars/events/{event_id}/update validates write access to the source calendar but does not validate the destination calendar_id in the request body, ...

CVE-2026-54015

Open WebUI vulnerability CVE-2026-54015 : Before 0.9.6, the prompt history IDOR flaw allows cross-prompt access via /api/v1/prompts/id/{prompt_id}/history/diff, /update/version, and /history/{history_id}. Although the URL is bound to a prompt, the server fetches history entries globally by ID wit...

CVE-2026-54010

CVE-2026-54010 affects Open WebUI prior to version 0.9.6. An authenticated user could attach arbitrary file_id values to their own chat messages without ownership/read checks, and then leverage a forged chat-file link to access or delete the victim’s file via shared-chat authorization. The root c...

CVE-2025-65959

CVE-2025-65959 concerns a stored XSS in Open WebUI’s Notes PDF download feature. The vulnerability arises when HTML content from a Markdown note is assigned directly to innerHTML during PDF generation, enabling arbitrary JavaScript execution (e.g., SVG-based payloads) and session-token theft. Exp...

CVE-2026-26193

Open WebUI (self-hosted, offline) is affected prior to v0.6.44. The vulnerability arises from allowing manual modification of chat history to set the embeds property on a response message, which is loaded into an iframe with an aggressive sandbox (allow-scripts and allow-same-origin) that bypasse...

CVE-2026-28786

Open WebUI is a self-hosted offline AI platform. CVE-2026-28786 affects versions prior to 0.8.6, where an unsanitized filename field in the speech-to-text transcription endpoint allows any authenticated non-admin user to trigger a FileNotFoundError. The error message can include the server’s abso...

CVE-2026-28788

Open WebUI vulnerability CVE-2026-28788 affects the self-hosted Open WebUI AI platform. Before version 0.8.6, an authenticated user can overwrite any file’s content by ID via POST /api/v1/retrieval/process/files/batch. The endpoint performs no ownership check, enabling a user with read access to ...

CVE-2026-59212

Open WebUI vulnerability CVE-2026-59212 affects the Open WebUI platform. From version 0.9.6 up to, but not including, 0.10.0, verify_knowledge_file_access only checked read access; write and delete routes were later trusted via writable model.meta.knowledge entries. This allowed a user with read-...

CVE-2026-0767

Technical details for CVE-2026-0767 are not publicly available in the provided documents. Monitor for updates.

CVE-2026-29070

Open WebUI (self-hosted offline AI platform) prior to version 0.8.6 lacks proper access control when deleting files from a knowledge base. The only check is that the user has write access to the knowledge base or is an admin; no verification that the target file belongs to that knowledge base. As...

CVE-2026-59221

Open WebUI before 0.10.0 is affected by a path traversal guard bypass in sanitize_proxy_path (backend/open_webui/routers/terminals.py). The function decodes proxy paths only eight times, allowing a nine-times percent-encoded ../ traversal to bypass normalization and be decoded by the upstream ter...

CVE-2026-59225

Open WebUI vulnerability CVE-2026-59225 affects versions 0.8.12 up to before 0.10.0. An authenticated non-admin user with read access to an arena wrapper model can reach a restricted underlying model via task endpoints like /api/v1/tasks/moa/completions. The normal chat flow re-checks submodel ac...

CVE-2026-34222

Affected product: Open WebUI, a self-hosted offline AI platform. Issue: broken access control in tool values prior to version 0.8.11. Impact: potential exposure due to access control bypass; CVSS 3.1 base score 7.7 (HIGH) with Network attack vector, low privileges required, no user interaction, c...

CVE-2026-59219

Open WebUI 0.9.0–0.10.0: with Redis configured, the terminal websocket first-message authentication used decode_token without a Redis-backed is_valid_token revocation check, allowing revoked JWTs to continue authenticating realtime connections. Fixed in version 0.10.0. This affects realtime endpo...

CVE-2026-59220

Open WebUI (self-hosted AI platform) has a ReDoS in theSkill mention handling. In versions before 0.10.0, the SKILL_MENTION_RE and strip_re regexes in backend/open_webui/utils/middleware.py parsed mentions with overlapping quantifiers, allowing an authenticated user to send a message containing ...

CVE-2026-59213

Open WebUI (self-hosted AI platform) is affected in versions 0.6.27–0.10.0 by a bug in get_all_models handlers (routers/openai.py and routers/ollama.py) where a lambda was passed to aiocache key instead of key_builder. This caused permission-filtered per-user model lists to share a static cache e...

CVE-2026-59216

Open WebUI prior to 0.10.0 is vulnerable to cross-user code execution via unvalidated Socket.IO event-caller session_id. The get_event_call path delivers execute:python and execute:tool events to a client-supplied session_id after only confirming the session is connected, enabling an attacker who...

CVE-2026-59223

Open WebUI vulnerability CVE-2026-59223 affects the WEB_FETCH_FILTER_LIST logic prior to 0.10.0, allowing path-based blocklist bypasses (e.g., !internal.example.com in a URL path) and misalignment with hostname policy for sibling-domain matches. The issue is fixed in version 0.10.0. Impact is a p...

CVE-2026-59215

Open WebUI prior to 0.10.0 contains a cross-channel thread context exposure bug: channel thread parent_id binding did not bind to the URL, allowing an authenticated user to reference a message from another private or DM channel and disclose thread context across channels. The issue is fixed in ve...

CVE-2026-59218

Open WebUI prior to version 0.10.0 exposed an account enumeration flaw in the /api/v1/auths/signin endpoint. The login flow looked up users by email and only performed bcrypt verification when a credential existed, causing registered accounts to respond more slowly than missing email attempts. Th...

CVE-2026-59222

Open WebUI is a self-hosted AI platform. CVE-2026-59222 affects versions from 0.7.0 up to, but not including, 0.10.0. The vulnerability arises when GET /api/v1/channels/{id}/members returns full UserModelResponse objects for channel members, including settings.ui.toolServers[].key and webhook con...

CVE-2026-59217

Open WebUI prior to version 0.10.0 allowed a metadata.knowledge_id value in file uploads to auto-link files to a knowledge base, bypassing the write-access check on /api/v1/knowledge//file/add. This enabled read-only knowledge-base users to add arbitrary files. The issue is fixed in version 0.10....

CVE-2026-59227

Vulnerability summary: CVE-2026-59227 affects Open WebUI prior to 0.10.0. Affected endpoint: POST /api/v1/images/edit. The issue allowed a non-admin user with a verified account to bypass the global image-edit switch and per-user image-generation permissions, enabling server-side image editing wi...

CVE-2026-59715

Affected software: Open WebUI self-hosted AI platform. Vulnerability: Unauthenticated access to collaborative-document Socket.IO handlers (ydoc:awareness:update, ydoc:document:leave) that accepted events without authenticated user, enabling unauthorized manipulation of document collaboration stat...

CVE-2026-59214

Open WebUI (self-hosted AI platform) is affected by a vulnerability described as a stored web worker XSS via Pyodide. Prior to version 0.10.0, the platform runs client-side Python with Pyodide inside a same-origin web worker, which could allow stored chat payloads using pyodide.http.pyfetch or th...

CVE-2026-59226

Open WebUI vulnerability CVE-2026-59226 affects versions prior to 0.10.0 of the Open WebUI platform. The issue stems from execute_automation rehydrating automation owners without rechecking that they were still active or had features.automations, and from check_model_access only enforcing private...

CVE-2026-56398

Open WebUI before 0.9.5 is vulnerable to stored XSS via the OAuth picture claim SVG data URI. The code infers MIME type from the URL extension (e.g., .svg) and ignores the server-provided Content-Type, then stores data URI labelling it as image/svg+xml. The profile image validator is bypassed in ...

CVE-2026-56400

open-webui before 0.3.14 is described as vulnerable to a cross-origin resource sharing misconfiguration that allows arbitrary origins (allow_origins=*) and authenticated requests to the /api/v1/functions endpoint. The result is remote code execution by crafting malicious cross-site requests from ...