{"schemaVersion":3,"id":"CVE-2026-105741","aliases":["GHSA-4f6c-2vvp-gw82","PYSEC-2026-4229"],"status":"published","duplicateOf":null,"title":null,"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. 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