CVE-2026-85666 ogx 1.3.1 Server-Side Request Forgery via MCP tool server_url
Unauthenticated attackers can exploit SSRF in OGX to access internal resources and cloud metadata via MCP tool definitions.
- 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-2026-85666?
CVE-2026-85666 is a high-severity server-side request forgery vulnerability in ogx-ai ogx, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OGX (formerly Llama Stack, affected at commit fbe8e0f) contains an unauthenticated server-side request forgery vulnerability in the OpenAI-compatible POST /v1/responses endpoint. MCP tool definitions accept a server_url parameter (along with headers and authorization values) that is fetched server-side without destination validation; the existing validate_url_not_private() guard used for other URL inputs is not applied to server_url. On the default starter configuration, which runs without authentication, a remote unauthenticated attacker can cause the server to open connections to arbitrary internal addresses (including cloud metadata endpoints such as http://169.254.169.254/) and forward attacker-supplied headers and bearer tokens to those destinations.
Weakness: CWE-918
Which versions are affected by CVE-2026-85666?
How do I fix CVE-2026-85666?
No fix has been published for CVE-2026-85666 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-85666 being exploited?
There is no known exploitation of CVE-2026-85666 in the wild and no public exploit code.
Sources
Also known as GHSA-9mg6-c5wp-2g44.