CVE-2026-70480 Open WebUI: Client-side SSRF via unrestricted external resource loading in Vega/Vega-Lite chart rendering

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.34 until 0.11.0, Open WebUI renders vega and vega-lite fenced code blocks in chat content by building a Vega view in the viewer browser without a restricted resource loader. Any user who can place such ...

Server-side Request Forgery (SSRF)

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the SafePlaywrightURLLoader process. An attacker can access sensitive internal resources by submitting a crafted URL when the Playwright web loader is enabled, allowing th...

GHSA-W2RX-84HP-GG95 Open WebUI: SSRF into internal services via unvalidated sub-resource requests in the Playwright web loader

Summary With the Playwright web loader enabled, Open WebUI opens user-submitted URLs in a real browser and validates the destination address before allowing the request. That check only ran for the top-level page request. Every other request the page issued was passed through unvalidated, so a pa...

CVE-2026-70479 Open WebUI: SSRF into internal services via unvalidated sub-resource requests in the Playwright web loader

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, with WEBLOADERENGINE=playwright, the Playwright web loader validates only the top-level page request and lets sub-resource requests pass unvalidated. A page supplied by an authenticated...

CVE-2026-70479 Open WebUI: SSRF into internal services via unvalidated sub-resource requests in the Playwright web loader

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, with WEBLOADERENGINE=playwright, the Playwright web loader validates only the top-level page request and lets sub-resource requests pass unvalidated. A page supplied by an authenticated...

CVE-2026-70479

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, with WEBLOADERENGINE=playwright, the Playwright web loader validates only the top-level page request and lets sub-resource requests pass unvalidated. A page supplied by an authenticated...

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

AI assistance was used to help inspect the code and prepare this report. SummaryThe fix for GHSA-r2wg-2mcr-66rv is incomplete in v0.9.6 and current main. backend/openwebui/routers/terminals.py documents sanitizeproxypath as decoding until stable, but the implementation stops after 8 unquote passe...

Open WebUI: Private channel messages can be disclosed through cross-channel thread parent_id binding

SummaryA normal authenticated user can read the content of a message in a private channel they do not belong to. GET /api/v1/channels/id/messages/messageid/thread authorizes the caller against the URL channel, but the underlying thread lookup loads the thread parent by id and returns it without...

PYSEC-2026-3600 Open WebUI: Terminal proxy forwards a spoofable, integrity-unbound user identity to the upstream (X-User-Id header and ws_terminal session_id query injection)

Summary The terminal proxy in backend/openwebui/routers/terminals.py forwards the Open WebUI user's identity to the upstream terminal server / backend coordinator as an authorization claim, with no cryptographic binding to the session that produced it. The forwarded identity is...

PYSEC-2026-3591 Open WebUI: Private channel messages can be disclosed through cross-channel thread parent_id binding

Summary A normal authenticated user can read the content of a message in a private channel they do not belong to. GET /api/v1/channels/id/messages/messageid/thread authorizes the caller against the URL channel, but the underlying thread lookup loads the thread parent by id and returns it without...

Open WebUI: Model meta.knowledge read-only file access can be upgraded to file write/delete

SummaryCurrent main and v0.9.6 still allow an authenticated user to turn read-only access to another user's file into write/delete access by attaching that file ID to an attacker-controlled workspace model.This is an incomplete-fix variant of GHSA-vjqm-6gcc-62cr. The current fix adds...

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

SummaryAn 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...

PYSEC-2026-3588 Open WebUI: Model meta.knowledge read-only file access can be upgraded to file write/delete

Summary Current main and v0.9.6 still allow an authenticated user to turn read-only access to another user's file into write/delete access by attaching that file ID to an attacker-controlled workspace model. This is an incomplete-fix variant of GHSA-vjqm-6gcc-62cr. The current fix adds...

Open WebUI: Cross-user model-list exposure via static cache key in get_all_models (aiocache key= vs key_builder= misuse)

SummaryThe getallmodels handlers in routers/openai.py and routers/ollama.py intended to cache their permission-filtered model lists per user, but the @cached decorator was misconfigured: it passed a key= lambda instead of keybuilder=. In aiocache 0.12.3 the pinned version, key= is a static cache...

Open WebUI: Stored web worker XSS via Pyodide

Title: Same-origin Pyodide code execution allows server-side RCE via a shared chat SummaryOpen WebUI runs client-side Python Pyodide in a same-origin web worker. Through Pyodide's JavaScript API pyodide.http.pyfetch, or the js module which exposes the page's fetch / XMLHttpRequest executed Python...

PYSEC-2026-3589 Open WebUI: Cross-user model-list exposure via static cache key in get_all_models (aiocache key= vs key_builder= misuse)

Summary The getallmodels handlers in routers/openai.py and routers/ollama.py intended to cache their permission-filtered model lists per user, but the @cached decorator was misconfigured: it passed a key= lambda instead of keybuilder=. In aiocache 0.12.3 the pinned version, key= is a static cache...

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

Open WebUI upload metadata can add files to knowledge bases without write permission SummaryOpen WebUI's file upload background processing trusts the client-supplied metadata.knowledgeid value and inserts a knowledgefile association before validating that the uploading user has write access to th...

PYSEC-2026-3593 Open WebUI: Upload `metadata.knowledge_id` bypasses the knowledge-base write-access check (read-only users can add files to KB)

Open WebUI upload metadata can add files to knowledge bases without write permission Summary Open WebUI's file upload background processing trusts the client-supplied metadata.knowledgeid value and inserts a knowledgefile association before validating that the uploading user has write access to t...

PYSEC-2026-3604 Open WebUI: POST /api/v1/images/edit bypasses the global image-edit switch and the per-user image-generation permission

Summary POST /api/v1/images/edit performed no authorization beyond requiring a verified account. Every other image-editing surface in Open WebUI enforces the global image-edit switch and the per-user image-generation permission — the /api/v1/images/generations route, the built-in editimage tool,...

PYSEC-2026-3595 Open WebUI: Realtime endpoints accept Redis-revoked JWTs after signout/backchannel logout

Summary With Redis configured, Open WebUI supports JWT revocation: POST /api/v1/auths/signout per-token jti and OIDC back-channel logout per-user revokedat record revocations in Redis, and HTTP auth getcurrentuser rejects revoked tokens with 401. The realtime authentication surfaces do not perfor...