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...

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: 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...

open-webui (>=0.5.17, <=0.6.40), open-webui-steve (0.6.5.45) +1 more potentially affected by CVE-2026-61632 via pymdown-extensions (10.14.2)

pymdown-extensions PYPI version 10.14.2 is affected by a known vulnerability. The following packages have a transitive dependency on pymdown-extensions and may be impacted: - open-webui =0.5.17, =0.6.40 - open-webui-steve 0.6.5.45 - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-61632 Sourc...

aurapro-ui (>=3.1.0, <=3.7.4), leopath (>=0.1.3, <=0.2.1) +2 more potentially affected by CVE-2026-61632 via pymdown-extensions (10.21.0)

pymdown-extensions PYPI version 10.21.0 is affected by a known vulnerability. The following packages have a transitive dependency on pymdown-extensions and may be impacted: - aurapro-ui =3.1.0, =0.1.3, =0.4.3, =0.8.11, =0.9.6 Source cves: CVE-2026-61632 Source advisory: OSV:PYSEC-2026-3609...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-59216 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-59216 Source advisory: OSV:PYSEC-2026-3592...

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...

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-2026-3604 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-2026-3593 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-2026-3595 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...

bestatic (>=0.0.34, <=0.0.36), mkdocs-techdocs-core (1.6.1) +1 more potentially affected by CVE-2026-61632 via pymdown-extensions (10.19.1)

pymdown-extensions PYPI version 10.19.1 is affected by a known vulnerability. The following packages have a transitive dependency on pymdown-extensions and may be impacted: - bestatic =0.0.34, =0.6.42, =0.6.43 Source cves: CVE-2026-61632 Source advisory: OSV:PYSEC-2026-3609...

open-webui (0.6.41) potentially affected by CVE-2026-61632 via pymdown-extensions (10.17.2)

pymdown-extensions PYPI version 10.17.2 is affected by a known vulnerability. The following packages have a transitive dependency on pymdown-extensions and may be impacted: - open-webui 0.6.41 Source cves: CVE-2026-61632 Source advisory: OSV:PYSEC-2026-3609...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-59214 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-59214 Source advisory: OSV:PYSEC-2026-3590...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-59218 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-59218 Source advisory: OSV:PYSEC-2026-3594...

dike (>=0.1.0, <=0.4.0), liara (>=2.1.0, <=2.3.2) +9 more potentially affected by CVE-2026-61632 via pymdown-extensions (8.2.0)

pymdown-extensions PYPI version 8.2.0 is affected by a known vulnerability. The following packages have a transitive dependency on pymdown-extensions and may be impacted: - dike =0.1.0, =2.1.0, =0.1.0, =0.19.1, =0.13.0, =0.3.0, =2.2.0, =0.1.0, =0.1.6 Source cves: CVE-2026-61632 Source advisory:...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-59217 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-59217 Source advisory: OSV:PYSEC-2026-3593...

Open WebUI: ReDoS in skill-mention regexes causes whole-instance DoS on default config

SummaryTwo regexes in backend/openwebui/utils/middleware.py that parse skill-mention tags backtrack in On² on input that contains . Both run synchronously, on the asyncio event loop, on every chat completion with no feature gate. Because the default deployment is a single uvicorn worker, one such...

PYSEC-2026-3594 Open WebUI: Account enumeration via observable login timing discrepancy

Summary The /api/v1/auths/signin endpoint leaked whether an email address belonged to a registered account through a response-time side channel. Password verification ran bcrypt only when the email was found in the database; for a non-existent email the request returned early without hashing. The...