Vulnerability · Published Sep 4, 2026 · Assigned by VulnCheck

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

High 7.5

In plain English

A high-severity server-side request forgery in ogx from ogx-ai. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.7%top 45.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
ogx-ai	ogx	0 – through 1.3.1

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

GitHub Issue #6287 issue-tracking
https://github.com/ogx-ai/ogx product
https://github.com/ogx-ai/ogx/blob/v1.3.1/src/ogx/providers/utils/tools/mcp.py technical-description
VulnCheck Advisory: ogx 1.3.1 Server-Side Request Forgery via MCP tool server_url third-party-advisory