CVE-2026-44427

The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. From 1.1.0 to 1.7.4, the TrailingSlashMiddleware in internal/api/server.go is vulnerable to an open redirect attack. An attacker can craft a URL with a protocol-relative path e.g., //evil.com/ tha...

CVE-2026-44427 MCP Registry: Open Redirect

The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. From 1.1.0 to 1.7.4, the TrailingSlashMiddleware in internal/api/server.go is vulnerable to an open redirect attack. An attacker can craft a URL with a protocol-relative path e.g., //evil.com/ tha...

CVE-2026-45781 MCP Registry: OCI ownership validation fails open on upstream rate limits, allowing attacker-controlled package claims

The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior to 1.7.9, OCI ownership validation skips label-match check when upstream OCI registry returns HTTP 429, letting any authenticated publisher bind their io.github./ namespace to OCI images the...

Race Condition

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Race Condition through a race condition in the LDAP and OAuth authentication processes. An attacker can obtain administrative privileges by sending multiple concurrent authentication requests during the initi...

GHSA-H3WW-Q6XX-W7X3 Open WebUI: LDAP and OAuth First-User Race Condition Allows Multiple Admin Accounts

Summary The LDAP and OAuth authentication flows use a TOCTOU Time-of-Check-Time-of-Use pattern for first-user admin role assignment. The regular signup handler signuphandler in auths.py, line 663 was explicitly patched to prevent this race with the comment "Insert with default role first to avoid...

Incorrect Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Incorrect Authorization through the /api/v1/utils/code/execute endpoint, which fails to enforce the ENABLECODEEXECUTION configuration flag. An attacker can execute arbitrary Python code within the Jupyter...

GHSA-482J-2PQ6-Q5W4 Open WebUI: Jupyter code execution works despite `ENABLE_CODE_EXECUTION=false` — feature gate bypassed

Summary The /api/v1/utils/code/execute endpoint executes arbitrary Python code via Jupyter for any verified user, even when the admin has set ENABLECODEEXECUTION=false. The feature gate is not enforced on the API endpoint — the configuration says "disabled" but code still executes. Details The...

Authorization Bypass Through User-Controlled Key

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key in the hasaccesstofile process. An attacker can permanently delete files owned by other users, as well as read or modify their contents, by leveraging access t...

Open WebUI: Unauthenticated endpoint can trigger embedding generation (cost/DoS)

Summary GET /api/v1/memories/ef is accessible without authentication and executes request.app.state.EMBEDDINGFUNCTION.... This allows any unauthenticated caller to trigger embedding generation which can lead to direct cost exposure if a paid provider is used. Code reference:...

Authorization Bypass Through User-Controlled Key

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key in the GET /api/v1/notes/noteid endpoint due to missing authorization checks. An attacker can access and retrieve notes belonging to other users by manipulatin...

NPM: Open WebUI has Stored XSS in Banner Component via Improper Sanitization Order

NPM: Open WebUI has Stored XSS in Banner Component via Improper Sanitization Order vulnerability discovered by ? in WordPress Npm open-webui versions = 0.7.2...

Cross-site Scripting (XSS)

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Cross-site Scripting XSS via improper sanitization order in the Banner component. An attacker can execute arbitrary JavaScript in the context of privileged users by injecting malicious payloads into the banne...

Cross-site Scripting (XSS)

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Cross-site Scripting XSS via the profileimageurl process. An attacker can execute arbitrary JavaScript in the context of another authenticated user's session by crafting a malicious SVG image as their OAuth...

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 through getcontentfromurl in retrieval/utils.py, SafeWebBaseLoader in web/base.py, and imageedits in routers/images.py. An attacker can cause the server to fetch internal...

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 through the validateurl function in the URL parsing and request-routing path. An attacker can reach internal or loopback targets by supplying a URL containing a backslash, tab...

GHSA-8W7Q-Q5JP-JVGX Open WebUI has a Server-Side Request Forgery (SSRF) bypass in `validate_url`

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

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

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

Missing Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Missing Authorization in the GET /api/tasks and POST /api/tasks/stop/taskid endpoints, which lack proper ownership checks. An attacker can enumerate and terminate background tasks belonging to other users by...

Open WebUI: Low-privilege authenticated users can enumerate and stop global background tasks, causing system-wide chat disruption

Summary Any authenticated user with low privileges can enumerate active background tasks across the system and stop tasks belonging to other users via the GET /api/tasks and POST /api/tasks/stop/taskid methods. This allows a casual user to disrupt system-wide chat usage by continuously canceling...

Authorization Bypass Through User-Controlled Key

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key in the retrieval process, specifically when validating access to knowledge base collections by UUID. An attacker can access, modify, or delete another user's...