{"id":"CVE-2026-105741","summary":"Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write","details":"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.","aliases":["GHSA-4f6c-2vvp-gw82"],"modified":"2026-10-07T02:47:36.004244347Z","published":"2026-10-05T20:56:00.060Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-290","CWE-345"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105741.json"},"references":[{"type":"WEB","url":"https://github.com/langflow-ai/langflow/releases/tag/v1.10.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105741.json"},{"type":"ADVISORY","url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105741"},{"type":"FIX","url":"https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72"},{"type":"FIX","url":"https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639"},{"type":"FIX","url":"https://github.com/langflow-ai/langflow/pull/13915"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/langflow-ai/langflow","events":[{"introduced":"9ad92eaeaa935db67deca300c40ed0dffea39131"},{"fixed":"1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72"},{"fixed":"94859df33acd70b2a1f816e26d68f5e89a7e5639"},{"fixed":"a8d94f9f4fb34fe488ec317bdade4e83611ef17a"}],"database_specific":{"extracted_events":[{"introduced":"1.5.0"},{"fixed":"1.10.3"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105741.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L"}]}