CVE-2026-57206 SimpleChat plugin validation endpoints missing authentication and authorization
Unauthenticated attackers can access admin plugin validation and repair endpoints due to missing runtime authorization checks in SimpleChat.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-57206?
CVE-2026-57206 is a high-severity missing authorization vulnerability in microsoft simplechat, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SimpleChat is a secure AI conversation application with personal and group workspaces for document-grounded interactions. Prior to 0.241.206, several plugin validation routes in application/single_app/plugin_validation_endpoint.py, including `POST /api/admin/plugins/test-instantiation`, `GET /api/admin/plugins/health-check/<plugin_name>`, `POST /api/admin/plugins/repair/<plugin_name>`, and `POST /api/plugins/validate`, relied on @swagger_route(security=get_auth_security()) documentation without enforcing @login_required, @user_required, or @admin_required at runtime, allowing unauthenticated or unauthorized clients to invoke plugin validation, health, and repair behavior. This issue is fixed in version 0.241.206.
Which versions are affected by CVE-2026-57206?
How do I fix CVE-2026-57206?
No fix has been published for CVE-2026-57206 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-57206 being exploited?
There is no known exploitation of CVE-2026-57206 in the wild and no public exploit code.
Sources
Also known as GHSA-g6gr-xp46-hrmj.