CVE-2026-59715

Open WebUI: Unauthenticated WebSocket Access to Collaborative Document Handlers (ydoc:awareness:update, ydoc:document:leave)

@sio.on('ydoc:awareness:update')
async def yjs_awareness_update(sid, data):
    document_id = data['document_id']
    user_id = data.get('user_id', sid)
    update = data['update']
    # No SESSION_POOL check, no room membership check
    await sio.emit(
        'ydoc:awareness:update',
        {'document_id': document_id, 'user_id': user_id, 'update': update},
        room=f'doc_{document_id}',
        skip_sid=sid,
    )

@sio.on('ydoc:document:leave')
async def yjs_document_leave(sid, data):
    document_id = data['document_id']
    user_id = data.get('user_id', sid)
    # No auth check
    await YDOC_MANAGER.remove_user(document_id=document_id, user_id=sid)
    await sio.emit('ydoc:user:left',
        {'document_id': document_id, 'user_id': user_id},
        room=f'doc_{document_id}')

sio = socketio.AsyncServer(
    always_connect=True,   # Never rejects connections
    ...
)

• UI disruption: Fake cursor positions and user presence in collaborative editing sessions
• User impersonation: Attacker can spoof any user_id in awareness updates
• Resource exhaustion: Unlimited unauthenticated WebSocket connections maintained by the server

Note: Other Ydoc handlers (ydoc:document:join, ydoc:document:update, ydoc:document:state) correctly check SESSION_POOL membership.

A critical operation is accessible without requiring any authentication. Typical impact: any user can invoke the privileged function.

CVE-2026-59715 has a CVSS score of 3.1 (Low). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (0.10.0); upgrading removes the vulnerable code path.

Kodem intelligence

Already deployed Kodem?

1. Set always_connect=False or reject unauthenticated connections in the connect handler
2. Add SESSION_POOL checks to ydoc:awareness:update and ydoc:document:leave
3. Add room membership verification before broadcasting to document rooms

AI Disclosure (per Rule 11): AI (Claude) was used to assist with source code review, identifying potential vulnerability patterns, and drafting this report. The researcher directed the analysis, selected focus areas, and independently verified all findings against a running v0.8.12 Docker instance using real HTTP requests with two test accounts. The PoCs included are reproducible and were confirmed live before submission.

1. What is CVE-2026-59715? CVE-2026-59715 is a low-severity missing authentication for critical function vulnerability in open-webui (pip), affecting versions >= 0.6.16, < 0.10.0. It is fixed in 0.10.0. A critical operation is accessible without requiring any authentication.
2. How severe is CVE-2026-59715? CVE-2026-59715 has a CVSS score of 3.1 (Low). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of open-webui are affected by CVE-2026-59715? open-webui (pip) versions >= 0.6.16, < 0.10.0 is affected.
4. Is there a fix for CVE-2026-59715? Yes. CVE-2026-59715 is fixed in 0.10.0. Upgrade to this version or later.
5. Is CVE-2026-59715 exploitable, and should I be worried? Whether CVE-2026-59715 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2026-59715 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2026-59715? Upgrade open-webui to 0.10.0 or later.

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