{"api_version":"1","generated_at":"2026-10-06T00:41:10+00:00","cve":"CVE-2026-105741","urls":{"html":"https://cve.report/CVE-2026-105741","api":"https://cve.report/api/cve/CVE-2026-105741.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-105741","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-105741"},"summary":{"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.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-10-05 21:16:35","updated_at":"2026-10-05 21:16:35"},"problem_types":["CWE-290","CWE-345","CWE-290 CWE-290: Authentication Bypass by Spoofing","CWE-345 CWE-345: Insufficient Verification of Data Authenticity"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"LOW"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","data":{"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"}}],"references":[{"url":"https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72","name":"https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/langflow-ai/langflow/releases/tag/v1.10.3","name":"https://github.com/langflow-ai/langflow/releases/tag/v1.10.3","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639","name":"https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/langflow-ai/langflow/pull/13915","name":"https://github.com/langflow-ai/langflow/pull/13915","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"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","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-105741","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105741","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"langflow-ai","product":"langflow","version":"affected >= 1.5.0, < 1.10.3","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"langflow","vendor":"langflow-ai","versions":[{"status":"affected","version":">= 1.5.0, < 1.10.3"}]}],"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."}],"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","description":"CWE-290: Authentication Bypass by Spoofing","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-345","description":"CWE-345: Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-05T20:56:00.060Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82","tags":["x_refsource_CONFIRM"],"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82"},{"name":"https://github.com/langflow-ai/langflow/pull/13915","tags":["x_refsource_MISC"],"url":"https://github.com/langflow-ai/langflow/pull/13915"},{"name":"https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72","tags":["x_refsource_MISC"],"url":"https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72"},{"name":"https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639","tags":["x_refsource_MISC"],"url":"https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639"},{"name":"https://github.com/langflow-ai/langflow/releases/tag/v1.10.3","tags":["x_refsource_MISC"],"url":"https://github.com/langflow-ai/langflow/releases/tag/v1.10.3"}],"source":{"advisory":"GHSA-4f6c-2vvp-gw82","discovery":"UNKNOWN"},"title":"Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remote Configuration Write"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-105741","datePublished":"2026-10-05T20:56:00.060Z","dateReserved":"2026-10-05T19:11:07.946Z","dateUpdated":"2026-10-05T20:56:00.060Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-05 21:16:35","lastModifiedDate":"2026-10-05 21:16:35","problem_types":["CWE-290","CWE-345","CWE-290 CWE-290: Authentication Bypass by Spoofing","CWE-345 CWE-345: Insufficient Verification of Data Authenticity"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"LOW"},"exploitabilityScore":2.8,"impactScore":4.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"105741","Ordinal":"1","Title":"Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remo","CVE":"CVE-2026-105741","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"105741","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Langflow: IP Spoofing Bypass via `X-Forwarded-For` Allowing Remo"}]}}}