What’s Vulnerable › Vulnerabilities

CVE-2026-85666: ogx 1.3.1 Server-Side Request Forgery via MCP tool server_url

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-04 · updated 2026-09-23
• Weakness: CWE-918

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.

Affected products

• ogx-ai ogx: through 1.3.1

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-mcp-tool-server-url

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