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-2026-44555

Open WebUI (self-hosted AI platform) has a vulnerability where a model created with base_model_id can chain to a restricted base model without validating access to that base model. Before 0.9.0, during model creation, the system does not verify the creator’s permission on the referenced base mode...

CVE-2026-44561

CVE-2026-44561 affects Open WebUI. The vulnerability arises in the is_user_channel_member check: before 0.9.0, the code verifies ChannelMember existence but ignores is_active, so deactivated members (status 'left', is_active=False) retain full read/write access to group/DM channels via direct API...

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-2026-44565

CVE-2026-44565 affects Open WebUI prior to 0.6.10. The upload API derives the target path from the original HTTP upload filename without validation, enabling dot-segment path traversal and arbitrary file writes to locations the web server user can access. This is fixed in 0.6.10. Mitigation guida...

CVE-2026-54021

Summary: Open WebUI prior to 0.9.6 allows any authenticated user to direct requests to arbitrary Ollama backends by appending a caller-supplied url_idx, bypassing backend-level isolation and possibly reaching restricted or disabled backends. The issue arises on index-addressed Ollama proxy routes...

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-2026-44721

CVE-2026-44721 documents a stored XSS in Open WebUI prior to version 0.9.0. The vulnerability arises from a flawed sanitizeResponseContent path that escapes HTML but does not neutralize a markdown link with a javascript: URI rendered via {@html}, enabling an authenticated user with workspace.mode...

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-2026-54013

CVE-2026-54013 describes a stored XSS in Open WebUI where the model profile image URL could be a data:image/svg+xml;base64 payload. The root cause is missing input validation on ModelMeta.profile_image_url and missing output protections in the model image endpoint (no MIME allowlist, no nosniff, ...

CVE-2025-63681

Open-WebUI CVE-2025-63681 affects v0.6.33. The API endpoint /api/tasks/stop/ allows direct cancellation of tasks without verifying ownership, enabling a normal user to stop arbitrary LLM response tasks (Incorrect Access Control). Base score 4.3 (Medium); attack vector NETWORK, privileges required...

CVE-2026-44549

CVE-2026-44549 details (Open WebUI) : Open WebUI before 0.8.0 previews Excel attachments unsafely. The XLSX payload can trigger sheet_to_html to embed an XSS payload, which is then inserted into the DOM via @html without sanitization, enabling stored XSS. The issue is resolved in version 0.8.0. R...

CVE-2026-44567

Open WebUI improperly authorizes users with a pending role. The CVE describes that prior to v0.1.124 the API does not validate that a user has an authorized role, allowing a pending user to access endpoints intended for authenticated users. Technical details show get_current_user() validates JWTs...

CVE-2026-45349

Open WebUI had a broken access control issue for the completions API ( /api/chat/completions ) allowing a user to continue another user’s conversation if they knew the other user’s Chat ID. This privacy/policy bypass could expose private conversations. The issue affects prior to version 0.9.0 and...

CVE-2026-45350

Open WebUI (self-hosted AI platform) has a vulnerability in the chat_completion API prior to version 0.8.6 where user-supplied tool_ids/tool_servers are used to build a tools_dict without permission checks. This allows invoking any server tool using the server’s credentials, bypassing tool restri...

CVE-2026-88006

Open WebUI (a self-hosted AI platform) is affected by an authentication bypass in its OAuth token exchange endpoint from version 0.8.0 through 0.11.1 . The endpoint issues a session for a provider access token without executing the OAuth role management that the normal login callback performs. As...

CVE-2026-44550

Open WebUI prior to 0.9.0 vulnerable to mass assignment via Pydantic extra='allow' in FolderForm. The server constructs a FolderModel by merging attacker-controlled extra fields (from form_data.model_dump(exclude_unset=True)) over a server-populated user_id, and because user_id is a real field, a...

CVE-2026-54014

Open WebUI (open-webui/open-webui) before version 0.9.6 is affected by a sibling-prefix path traversal in the cache file endpoint. The vulnerability stems from serve_cache_file() validating the absolute path with file_path.startswith(os.path.abspath(CACHE_DIR)) without appending a trailing path s...

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-2026-45345

Open WebUI (self-hosted AI platform) has a vulnerability in the model update function prior to version 0.5.7 where an attacker could modify another user’s private model by changing access permissions during editing. The issue is confirmed in multiple sources (CVE-2026-45345, GHSA-gm54-m39w-grjp, ...

CVE-2026-45402

Open WebUI CVE-2026-45402 describes a cross-user file access/overwrite vulnerability in offline Open WebUI prior to 0.9.5. Two concrete paths allow attaching a victim’s file_id without verifying ownership: (1) folder knowledge ingestion via POST /api/v1/folders/{id}/update and (2) knowledge-base ...

CVE-2026-54016

CVE-2026-54016 : Open WebUI (self-hosted offline AI platform) suffers a Broken Object Level Authorization in the builtin search_knowledge_files tool. When native function calling is enabled and a model has no attached knowledge bases, an authenticated user can supply an arbitrary knowledge_id and...

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-2026-45299

Open WebUI had a stored XSS vulnerability in the profile_image_url field on the user profile update form prior to version 0.8.0, due to lack of MIME-type validation for data URIs. Two attack paths were demonstrated: (1) data:text/html;base64… opened in a new tab, and (2) data:image/svg+xml;base64...

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-2026-45400

CVE-2026-45400 relates to Open WebUI SSRF bypass in validate_url caused by a mismatch between urlparse and requests hostname handling. Before version 0.9.5, URLs like http://127.0.0.1:[email protected] could pass validation because hostname parsing treated the public IP (1.1.1.1) as the target, while ...

CVE-2026-44570

CVE-2026-44570 affects Open WebUI prior to version 0.6.19, where authorization controls around the memories API were inconsistent. A non-admin user could query, view, delete, or attempt to modify another user’s memories via endpoints such as POST /api/v1/memories/query, POST /api/v1/memories/{mem...

CVE-2026-34225

Open WebUI vulnerability CVE-2026-34225 affects the Open WebUI self-hosted AI platform (offline). Versions ≤ 0.7.2 expose a Blind Server Side Request Forgery in the image-edit workflow: a GET request to a user-supplied URL with no domain restrictions, enabling access to the local address space. B...

CVE-2026-44557

Open WebUI before v0.9.0 is vulnerable to global knowledge-base enumeration through the retrieval query endpoints. The _validate_collection_access function uses an incomplete allowlist that only enforces ownership for collections starting with user-memory- or file-, allowing any authenticated use...

CVE-2026-45338

Open WebUI CVE-2026-45338 describes an SSRF in _process_picture_url() (oauth.py) where the server fetches URLs from OAuth picture claims without validate_url(), enabling requests to internal resources and exfiltration of the full response. Affected software before the fix: Open WebUI prior to ver...

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-2026-87016

Open WebUI, a self-hosted AI platform, is affected by an OAuth authentication bypass in versions 0.6.41 through 0.11.1 . The root cause lies in get_user_by_oauth_sub and get_user_by_scim_external_id in backend/open_webui/models/users.py, where JSON "contains" matching compiled to SQL LIKE substri...

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-2026-56400

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 ...

CVE-2026-29071

CVE-2026-29071 affects Open WebUI. Before v0.8.6, any authenticated user could read other users’ private memories via the vulnerable endpoint /api/v1/retrieval/query/collection, enabling exposure of documents, memories, and user metadata. The root cause is missing authorization in collection quer...

CVE-2026-88005

Open WebUI versions 0.8.0 through 0.9.0 are affected by a bypass in the OAuth token exchange endpoint . The endpoint issues a valid session for a provider access token without enforcing the email domain allowlist that the standard OAuth login callback applies. As a result, an account whose email ...

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-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-2026-54015

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-2026-26193

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-2026-87996

Open WebUI (self-hosted AI platform), versions 0.9.6 through 0.11.1 , is affected by an SSRF via DNS rebinding in the SafePlaywrightURLLoader component (backend/open_webui/retrieval/web/utils.py). The root cause is a trust mismatch: a user-controlled hostname is validated in Python, but the Playw...

CVE-2026-87012

Open WebUI (a self-hosted AI platform) is affected in versions 0.9.0 through 0.11.1 by a type-validation flaw in backend/open_webui/models/calendar.py. The meta.alert_minutes field was stored without type validation while the shared upcoming-event scheduler compared it numerically. An authenticat...

CVE-2026-87999

Open WebUI (a self-hosted AI platform) had a server-side request forgery (SSRF) vulnerability in backend/open_webui/retrieval/web/utils.py, affecting the POST /api/v1/retrieval/process/web and POST /api/v1/retrieval/process/web/search endpoints. The root cause was that Python's globally routable ...

CVE-2026-87013

Open WebUI versions 0.10.0 through 0.11.1 contain a denial-of-service vulnerability in the folder tree functionality. The POST /api/v1/folders/{id}/update/parent endpoint allowed an authenticated user to place a folder under itself or one of its descendants, creating a parent cycle . Because the ...

CVE-2026-88002

Open WebUI (self-hosted AI platform), versions 0.5.0 through 0.11.1 , is affected by a denial-of-service vulnerability in the message-chain reconstruction helper in backend/open_webui/utils/misc.py. The helper advanced through chat history by map key but tracked visited entries using each message...

CVE-2026-87011

Open WebUI , a self-hosted AI platform, contains a denial-of-service vulnerability in the unauthenticated POST /oauth/backchannel-logout handler (backend/open_webui/utils/oauth.py). From version 0.9.0 through 0.11.1 , the handler fetched the OIDC discovery document and signing keys before validat...

CVE-2026-87017

Open WebUI , a self-hosted AI platform, contains an information disclosure flaw in its built-in knowledge search tool . From version 0.7.0 through 0.11.1 , the tool passed the caller's readable knowledge identifiers through a metadata filter, but the search methods in eleven shipped vector backen...

CVE-2026-87997

Open WebUI (self-hosted AI platform) versions 0.10.0 through 0.11.1 contain an access-control bypass in POST /api/chat/completions and POST /api/v1/chat/completions (backend/open_webui/main.py). A client-supplied folder_id was copied into a new chat without the folder write-access check enforced ...

CVE-2026-87014

Open WebUI (self-hosted AI platform) versions 0.9.0 through 0.11.1 contain a privilege-escalation issue in its role synchronization logic. The files backend/open_webui/routers/auths.py and backend/open_webui/utils/oauth.py updated an administrator's database role without invalidating the user rec...

CVE-2026-87015

Open WebUI versions 0.6.27 through 0.11.1 are affected by a session cookie leakage flaw in backend/open_webui/utils/tools.py . The cookie jar from the enclosing connection loop was not bound to each external tool callable, so when multiple tool servers were attached and a session or system OAuth ...