{"id":"CVE-2026-51994","title":"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","summary":"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","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-918"],"published":"2026-09-24","updated":"2026-09-25","sourceUpdated":"2026-09-25T19:17:26.853","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-51994","references":[{"url":"https://github.com/geelen/mcp-remote","label":"cve@mitre.org"},{"url":"https://github.com/geelen/mcp-remote/security/advisories","label":"cve@mitre.org"},{"url":"https://github.com/playb0t/mcp-remote-oauth-security#readme","label":"cve@mitre.org"},{"url":"https://github.com/playb0t/mcp-remote-oauth-security/blob/v1.0.1/advisories/F-01-resource-metadata-ssrf.md","label":"cve@mitre.org"}],"tags":["nvd","cve.org","exploit-available"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-09-25T18:11:53.566976Z"},"ingestedAt":"2026-09-24T15:45:56.639Z","epss":0.00353,"epssPercentile":0.28799,"exploits":{"github":1,"githubRepos":["https://github.com/playb0t/mcp-remote-oauth-security"],"checkedAt":"2026-10-27T19:02:37.656Z"},"exploitAvailable":true,"slug":"CVE-2026-51994","body":"## Overview\n\nmcp-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\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":62,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":219366,"id":"CVE-2026-51994","ts":1791809319529,"field":"exploit_available","old":"false","new":"true"},{"seq":211152,"id":"CVE-2026-51994","ts":1790363862764,"field":"cvss","old":null,"new":"9.1"},{"seq":211151,"id":"CVE-2026-51994","ts":1790363862764,"field":"severity","old":"none","new":"critical"}]}