Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/ogx-ai/ogx
- https://github.com/ogx-ai/ogx/blob/v1.3.1/src/ogx/providers/utils/tools/mcp.py
- https://github.com/ogx-ai/ogx/issues/6287
- https://www.vulncheck.com/advisories/ogx-1.3.1-server-side-request-forgery-via-m
FAQ
What is CVE-2026-85666?
CVE-2026-85666 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ...
How severe is CVE-2026-85666?
CVE-2026-85666 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-85666?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.