Access Control Bypass

Overview Affected versions of this package are vulnerable to Access Control Bypass in the demographics questionnaire admin editor interface due to missing authorization checks on the /admin/demographics/questions route. An attacker can gain unauthorized access to administrative question-managemen...

Open WebUI vulnerable to stored XSS via unescaped markdown token in MarkdownTokens.svelte leading to full account takeover and RCE via functions

SummaryA vulnerability in the way certain html tags in chat messages are rendered allows attackers to inject JavaScript code into a chat transcript. The JavaScript code will be executed in the user's browser every time that chat transcript is opened, allowing attackers to retrieve the user's acce...

Open WebUI allows limited stored XSS vila uploaded html file

SummaryLow privileged users can upload HTML files which contain JavaScript code via the /api/v1/files/ backend endpoint. This endpoint returns a file id, which can be used to open the file in the browser and trigger the JavaScript code in the user's browser. Under the default settings, files...

PYSEC-2026-2713 Open WebUI allows limited stored XSS vila uploaded html file

Summary Low privileged users can upload HTML files which contain JavaScript code via the /api/v1/files/ backend endpoint. This endpoint returns a file id, which can be used to open the file in the browser and trigger the JavaScript code in the user's browser. Under the default settings, files...

PYSEC-2026-2587 Lemur user-update path stores plaintext passwords

Summary lemur.users.service.update writes a user's new password as plaintext to the users.password column. The User model wires bcrypt hashing to SQLAlchemy's beforeinsert event but registers no equivalent listener for beforeupdate, and service.update does not call user.hashpassword after assigni...

PYSEC-2026-2591 Lemur Privilege Escalation: Non-admin role members can rewrite role membership via PUT /api/1/roles/<id>

Summary The PUT /api/1/roles/ handler in lemur/roles/views.py gates only on RoleMemberPermissionroleid.can, which is satisfied for any user who is already a member of the target role. The handler then passes data"users" and data"name" directly to service.update, permitting any role member to...

PYSEC-2026-2666 motionEye's World-Readable Configuration File Exposes Admin Password Hash

Security Advisory: World-Readable Configuration File Exposes Admin Password Hash in motionEye Summary motionEye v0.43.1 and prior versions create the configuration file /etc/motioneye/motion.conf with 644 permissions -rw-r--r--, making it readable by any local user on the system. This file contai...

PYSEC-2026-2718 Open WebUI: Authenticated users can target arbitrary configured Ollama backends via unguarded url_idx path parameter

Summary Several direct, index-addressed Ollama proxy routes accept a caller-supplied urlidx path parameter and use it as a raw index into the admin-configured OLLAMABASEURLS list. Access control on these routes validates only whether the user may use the requested model, never which backend the...

PYSEC-2026-2751 Open WebUI: Path traversal / SSRF in terminal server proxy via encoded path traversal

Summary The terminal-server reverse proxy in backend/openwebui/routers/terminals.py does not fully confine the user-controlled path segment before forwarding it to an admin-configured terminal server. An authenticated user who has been granted access to a terminal server can craft path values...

PYSEC-2026-3400 Vantage6: Set admin user and password from environment or configuration

Impact Vantage6 currently provides an initial user with username root and password root. This is not ideal for the following reasons: - Attackers know that almost all vantage6 servers have a user with username root that probably has admin rights - The initial password is very weak and it is...

PYSEC-2026-2600 LiteLLM allows a user to modify their own user_role via the /user/update endpoint

LiteLLM prior to 1.83.10 allows a user to modify their own userrole via the /user/update endpoint. While the endpoint correctly restricts users to updating only their own account, it does not restrict which fields may be changed. A user who can reach this endpoint can set their role to proxyadmin...

PYSEC-2026-2598 LiteLLM allows an authenticated internal_user to create API keys with access to routes that their role does not permit

LiteLLM prior to 1.83.14 allows an authenticated internaluser to create API keys with access to routes that their role does not permit. When generating a key, the allowedroutes field is stored without verifying that the specified routes fall within the user's own permissions. A key created with...

PYSEC-2026-2741 Open WebUI Exposes System Prompt to Regular User [Non-Admin]

Summary A regular user non-admin can view the system prompt of the model which is set by an admin. Details When a regular user non-admin logs into the application, a http://IP:8080/api/models? web request is initiated by the application and in response, it reveals the system prompt of available...

PYSEC-2026-2733 Open WebUI has inconsistent authorization controls within memories API

Summary Authorization controls surrounding the memories API were inconsistent, resulting in the ability of a standard user to delete, restore, and view the contents of other users' memories. Details Using a newly created non-admin user with no existing memories, it is possible to view existing...

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...

PYSEC-2026-2697 Open WebUI: Stale Admin Role in Socket.IO Session Pool Enables Post-Demotion Cross-User Note Access

Stale Admin Role in Socket.IO Session Pool Enables Post-Demotion Cross-User Note Access Affected Component Socket.IO session state and role-check callsites: - backend/openwebui/socket/main.py lines 330-351, connect handler — role snapshotted into SESSIONPOOL - backend/openwebui/socket/main.py lin...

PYSEC-2026-2471 Ethyca Fides has a Privacy Request Identity Verification Bypass Vulnerability via Duplicate Detection

Summary Fides deployments that enable both subject identity verification and duplicate privacy request detection are affected by a vulnerability in which an administrator can approve a privacy request whose identity was never verified. For erasure policies, this can result in unauthorized deletio...

PYSEC-2026-2599 LiteLLM: Authenticated command execution via MCP stdio test endpoints

Impact Two endpoints used to preview an MCP server before saving it — POST /mcp-rest/test/connection and POST /mcp-rest/test/tools/list — accepted a full server configuration in the request body, including the command, args, and env fields used by the stdio transport. When called with a stdio...

PYSEC-2026-2989 pyLoad: Unprotected storage_folder enables arbitrary file write to Flask session store and code execution (Incomplete fix for CVE-2026-33509)

Summary The fix for CVE-2026-33509 GHSA-r7mc-x6x7-cqxx added an ADMINONLYOPTIONS set to block non-admin users from modifying security-critical config options. The storagefolder option is not in this set and passes the existing path restriction because the Flask session directory is outside both...

PYSEC-2026-2597 LiteLLM: Privilege escalation via unrestricted proxy configuration endpoint

Impact The /config/update endpoint does not enforce admin role authorization. A user who is already authenticated into the platform can then use this endpoint to do the following: - Modify proxy configuration and environment variables - Register custom pass-through endpoint handlers pointing to...