Open WebUI: Same-origin XSS to account takeover via terminal file-preview iframe hardcoding allow-same-origin

SummaryAny authenticated user with access to a terminal server could get script of their choosing to run in the Open WebUI origin itself. The HTML file preview rendered terminal-served files in an iframe whose sandbox always granted allow-same-origin alongside allow-scripts, and the file is serve...

EUVD-2026-52925

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, the built-in knowledge search path in backend/openwebui/tools/knowledgefs.py and backend/openwebui/tools/builtin.py let a chat participant choose a pattern used to grep knowledge files...

CVE-2026-70490

Open WebUI (self-hosted AI platform) versions 0.8.8–0.11.0 contain a flaw where the terminal WebSocket route in backend/open_webui/routers/terminals.py authenticates its own first-message JWT and omits the verified-user role gate enforced on HTTP terminal routes. As a result, accounts with pendin...

GHSA-73CQ-MCGH-379C Open WebUI: Instance-wide stall via automation recurrence rules that force multi-second parsing

Summary In every affected release, automation recurrence parsing anchors minutely and hourly rules at a fixed date of 2000-01-01 and then walks forward one interval at a time to find the next run. A single FREQ=MINUTELY rule therefore enumerates roughly a quarter-century of occurrences,...

GHSA-H6X2-583H-X99R Open WebUI: DNS Rebinding SSRF Bypass

Summary Open WebUI vetted user-supplied URLs by resolving the hostname once and rejecting private, loopback and link-local addresses, then let the HTTP client resolve that hostname again at connect time. An attacker who controls the authoritative DNS for a hostname they submit can answer with a...

CVE-2026-54020 Open WebUI: DNS Rebinding SSRF Bypass

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.0, Open WebUI resolved a hostname during URL validation and rejected private, loopback, and link-local addresses, but the HTTP clients resolved the hostname again at connection time. An authenticat...

EUVD-2026-52899

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, the sync cleanup endpoint authorized write access to the knowledge base in the URL but then acted on directory and file ids supplied in the request body without checking that those objec...

CVE-2026-70483 Open WebUI: Any authenticated user can cancel another user's chat generation via the chat delete endpoint

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, DELETE /api/v1/chats/id cancelled a chat's in-flight tasks before checking whether the caller could delete that chat. Any authenticated user who knew another user's chat id could abort...

PYSEC-2026-3601 Open WebUI: Arena task endpoints can bypass underlying model access controls

Summary An authenticated non-admin user with read access to an arena wrapper model can reach a restricted underlying model through task endpoints such as /api/v1/tasks/moa/completions. The normal chat route resolves arena models before the final chat dispatch and therefore re-checks the selected...

EUVD-2026-42650

open-webui terminal proxy path traversal guard bypass via 9x encoded traversal...

EUVD-2026-42639

Open WebUI: Arena task endpoints can bypass underlying model access controls...

EUVD-2026-42628

Open WebUI: Upload metadata.knowledgeid bypasses the knowledge-base write-access check read-only users can add files to KB...

EUVD-2026-42627

Open WebUI: Cross-user code-interpreter and tool execution via unvalidated Socket.IO event-caller sessionid...

EUVD-2026-42617

Open WebUI: Account enumeration via observable login timing discrepancy...

CVE-2026-56400

open-webui before 0.3.14 contains a cross-origin resource sharing misconfiguration allowing arbitrary origins with alloworigins= and authenticated requests to the /api/v1/functions endpoint. Attackers can execute arbitrary code on the openwebui instance by crafting malicious cross-site requests...

PYSEC-2026-2743 Open WebUI: SSRF Protection Bypass in Playwright Web Loader via HTTP Redirects

Summary The SafePlaywrightURLLoader implements a validateurl function to prevent SSRF attacks by checking the IP address of the user-provided URL. However, this validation is performed only on the initial URL. Since Playwright automatically follows HTTP redirects 301/302 by default, an attacker c...

Open WebUI has a Server-Side Request Forgery (SSRF) bypass in `validate_url`

SummaryIn the open-webui project, a parsing difference between the urlparse and requests libraries led to an SSRF bypass vulnerability. DetailsIn the current project, URL validation is performed using the function validateurl.The current checking logic uses urlparse to parse the hostname part of...

PYSEC-2026-2711 Open WebUI's Channel Access Grants Bypass filter_allowed_access_grants

Channel Access Grants Bypass filterallowedaccessgrants Affected Component Channel creation and update endpoints: - backend/openwebui/routers/channels.py lines 291-340, createnewchannel - backend/openwebui/routers/channels.py lines 617-638, updatechannelbyid - backend/openwebui/models/channels.py...

Open WebUI's Base Model Routing Bypasses Access Control via Model Chaining

Base Model Routing Bypasses Access Control via Model Chaining Affected ComponentModel chaining via basemodelid:- backend/openwebui/routers/models.py lines 170-214, createnewmodel- backend/openwebui/routers/models.py lines 254-308, importmodels- backend/openwebui/main.py lines 1696-1711, base mode...

PYSEC-2026-2765 Open WebUI's Insecure Direct Object Reference (IDOR) allows access to other users' memories

Summary Any authenticated user can read other users' private memories via /api/v1/retrieval/query/collection Details Vulnerability 1: Missing authorization in collection querying In backend/openwebui/routers/retrieval.py, the querycollectionhandler function accepts a list of collectionnames but...