{"id":"CVE-2026-105741","published":"2026-10-05T21:16:35.740","lastModified":"2026-10-06T17:17:18.810","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.","cvssScore":7.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","cwes":["CWE-290","CWE-345"],"vendors":[],"products":[],"references":[{"url":"https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72","tags":[]},{"url":"https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639","tags":[]},{"url":"https://github.com/langflow-ai/langflow/pull/13915","tags":[]},{"url":"https://github.com/langflow-ai/langflow/releases/tag/v1.10.3","tags":[]},{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82","tags":[]},{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82","tags":[]}],"exploitRefs":[{"url":"https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72","tags":[]},{"url":"https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639","tags":[]},{"url":"https://github.com/langflow-ai/langflow/pull/13915","tags":[]},{"url":"https://github.com/langflow-ai/langflow/releases/tag/v1.10.3","tags":[]},{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82","tags":[]},{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82","tags":[]}],"hasPoc":true,"ai":null}