{"id":"CVE-2026-105741","state":"PUBLISHED","title":"Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write","description":"Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.5.0 until 1.10.3, an IP spoofing vulnerability in the Model Context Protocol (MCP) configuration installation endpoint (POST /api/v1/mcp/project/{project_id}/install) allowed authenticated remote attackers to bypass the \"local-only\" access restriction. By sending a spoofed X-Forwarded-For: 127.0.0.1 header, an attacker could make the server treat the request as originating from localhost, letting them write/overwrite an MCP client configuration file on the server's filesystem. This vulnerability is fixed in 1.10.3.","publishedAt":"2026-10-05T20:56:00.060Z","updatedAt":"2026-10-06T16:43:02.046Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["langflow-ai langflow"],"affected":[{"vendor":"langflow-ai","product":"langflow","versions":[{"version":">= 1.5.0, < 1.10.3","status":"affected"}]}],"references":["https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82","https://github.com/langflow-ai/langflow/pull/13915","https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72","https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639","https://github.com/langflow-ai/langflow/releases/tag/v1.10.3"],"weaknesses":["CWE-290","CWE-345"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/105xxx/CVE-2026-105741.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-105741","state":"PUBLISHED","datePublished":"2026-10-05T20:56:00.060Z","dateUpdated":"2026-10-06T16:43:02.046Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-05T19:11:07.946Z"},"containers":{"cna":{"title":"Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write","descriptions":[{"lang":"en","value":"Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.5.0 until 1.10.3, an IP spoofing vulnerability in the Model Context Protocol (MCP) configuration installation endpoint (POST /api/v1/mcp/project/{project_id}/install) allowed authenticated remote attackers to bypass the \"local-only\" access restriction. By sending a spoofed X-Forwarded-For: 127.0.0.1 header, an attacker could make the server treat the request as originating from localhost, letting them write/overwrite an MCP client configuration file on the server's filesystem. This vulnerability is fixed in 1.10.3."}],"affected":[{"vendor":"langflow-ai","product":"langflow","versions":[{"version":">= 1.5.0, < 1.10.3","status":"affected"}]}],"references":[{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82","name":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/langflow-ai/langflow/pull/13915","name":"https://github.com/langflow-ai/langflow/pull/13915","tags":["x_refsource_MISC"]},{"url":"https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72","name":"https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72","tags":["x_refsource_MISC"]},{"url":"https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639","name":"https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639","tags":["x_refsource_MISC"]},{"url":"https://github.com/langflow-ai/langflow/releases/tag/v1.10.3","name":"https://github.com/langflow-ai/langflow/releases/tag/v1.10.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-290","lang":"en","description":"CWE-290: Authentication Bypass by Spoofing","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-345","lang":"en","description":"CWE-345: Insufficient Verification of Data Authenticity","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-05T20:56:00.060Z"},"source":{"advisory":"GHSA-4f6c-2vvp-gw82","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-06T16:42:30.466213Z","id":"CVE-2026-105741","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-06T16:43:02.046Z"}}]}}}