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-2026-45400

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-2026-45346

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-2026-45349

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-2026-54016

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-2026-28788

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-2026-34225

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-2026-44549

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-2026-44570

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-2026-54006

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-2026-44721

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-2026-45299

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-2026-45303

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-2026-29071

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-2026-45314

Open WebUI vulnerability CVE-2026-45314 describes a stored XSS in the profile image handling for webhooks. Before version 0.9.3, the channel webhook create/update flow accepts data URLs (data:image/svg+xml;base64,...) for profile_image_url. The API then serves the decoded SVG as image/svg+xml wit...

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-2026-44557

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-2026-56400

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-2026-54015

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-2026-26192

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-2026-28786

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-2026-26193

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-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...