---
id: CVE-2026-85666
title: >-
  OGX (formerly Llama Stack, affected at commit fbe8e0f) contains an
  unauthenticated server-side request forgery vulnerability in the
  OpenAI-compatible POST /v1/responses endpoint
summary: >-
  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 …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-918
vendor: ogx-ai
product: ogx
affected:
  - ogx <= 1.3.1
published: '2026-09-04'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:45.873'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85666'
references:
  - url: 'https://github.com/ogx-ai/ogx'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/ogx-ai/ogx/blob/v1.3.1/src/ogx/providers/utils/tools/mcp.py
    label: disclosure@vulncheck.com
  - url: 'https://github.com/ogx-ai/ogx/issues/6287'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/ogx-1.3.1-server-side-request-forgery-via-mcp-tool-server-url
    label: disclosure@vulncheck.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85666.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-85666'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2533309'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-85666'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85666'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00732
epssPercentile: 0.52276
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-14T19:20:32.845571Z'
ingestedAt: '2026-09-14T20:14:21.166Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Lightspeed Core, Red Hat OpenShift AI (RHOAI) · no fix planned: Lightspeed Core, Red Hat OpenShift AI (RHOAI) · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85666.json)