{"id":"CVE-2026-51994","published":"2026-09-24T15:17:22.947","lastModified":"2026-09-25T19:17:26.853","description":"mcp-remote versions 0.1.32 through 0.1.38 are vulnerable to Server-Side Request Forgery (SSRF) via the resource_metadata URL extracted from a remote MCP server's WWW-Authenticate header","cvssScore":9.1,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwes":["CWE-918"],"vendors":[],"products":[],"references":[{"url":"https://github.com/geelen/mcp-remote","tags":[]},{"url":"https://github.com/geelen/mcp-remote/security/advisories","tags":[]},{"url":"https://github.com/playb0t/mcp-remote-oauth-security#readme","tags":[]},{"url":"https://github.com/playb0t/mcp-remote-oauth-security/blob/v1.0.1/advisories/F-01-resource-metadata-ssrf.md","tags":[]}],"exploitRefs":[{"url":"https://github.com/geelen/mcp-remote","tags":[]},{"url":"https://github.com/geelen/mcp-remote/security/advisories","tags":[]},{"url":"https://github.com/playb0t/mcp-remote-oauth-security#readme","tags":[]},{"url":"https://github.com/playb0t/mcp-remote-oauth-security/blob/v1.0.1/advisories/F-01-resource-metadata-ssrf.md","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows an attacker to forge server-side requests, potentially leading to unauthorized access to internal resources via the WWW-Authenticate header.","exploitability":"Exploitation is moderately hard as it requires control over the remote MCP server's WWW-Authenticate header, but once achieved, can lead to full control over the affected system.","blast_radius":"If exploited, the impact could be severe, as it allows unauthorized access to internal resources, potentially leading to data theft or system compromise.","remediation":"Upgrade to mcp-remote version 0.1.39 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["ssrf","auth-bypass","web"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-28T08:52:32.092Z"}}