{"id":"CVE-2026-105741","title":"Langflow is a tool for building and deploying AI-powered agents and workflows","summary":"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/{proje…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","cwe":["CWE-290","CWE-345"],"vendor":"langflow-ai","product":"langflow","affected":["langflow >= 1.5.0, < 1.10.3"],"published":"2026-10-05","updated":"2026-10-05","sourceUpdated":"2026-10-05T21:16:35.740","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-105741","references":[{"url":"https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72","label":"security-advisories@github.com"},{"url":"https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639","label":"security-advisories@github.com"},{"url":"https://github.com/langflow-ai/langflow/pull/13915","label":"security-advisories@github.com"},{"url":"https://github.com/langflow-ai/langflow/releases/tag/v1.10.3","label":"security-advisories@github.com"},{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-05T21:34:25.115Z","slug":"CVE-2026-105741","body":"## Overview\n\nLangflow 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}