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CVE-2026-85666

ogx 1.3.1 Server-Side Request Forgery via MCP tool server_url

CVSS 4.0 8.7 HIGHCVSS 3.1 7.5 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-85666

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-85666

Published

ogx

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "ogx-ai",
                    "product": "ogx",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:pypi/ogx",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThanOrEqual": "1.3.1"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON