{"id":"CVE-2026-9186","title":"IBM Langflow OSS 1.0.0 through 1.11.2 allows remote authenticated attackers to bypass localhost-only MCP configuration installation by spoofing X-Forwarded-For: 127.0.0.1 header, enabling arbitrary writes to IDE config files (~/.cursor/m…","summary":"IBM Langflow OSS 1.0.0 through 1.11.2 allows remote authenticated attackers to bypass localhost-only MCP configuration installation by spoofing X-Forwarded-For: 127.0.0.1 header, enabling arbitrary writes to IDE config files (~/.cursor/m…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-284"],"vendor":"langflow","product":"langflow","affected":["langflow >= 1.0.0, < 1.11.3"],"patched":["langflow 1.11.3"],"published":"2026-09-04","updated":"2026-09-08","sourceUpdated":"2026-09-08T21:45:27.103","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-9186","references":[{"url":"https://www.ibm.com/support/pages/node/7285646","label":"psirt@us.ibm.com"}],"tags":["nvd","cve.org"],"epss":0.00271,"epssPercentile":0.19564,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-08T16:48:36.278568Z"},"ingestedAt":"2026-09-08T15:33:26.961Z","slug":"CVE-2026-9186","body":"## Overview\n\nIBM Langflow OSS 1.0.0 through 1.11.2 allows remote authenticated attackers to bypass localhost-only MCP configuration installation by spoofing X-Forwarded-For: 127.0.0.1 header, enabling arbitrary writes to IDE config files (~/.cursor/mcp.json, etc.).\n\n## Affected\n\n- `langflow >= 1.0.0, < 1.11.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `langflow 1.11.3`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}