CVE-2026-105741
highLangflow is a tool for building and deploying AI-powered agents and workflows.
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/langflow-ai/langflow/commit/1f39a4b9d62c9dfa1b21fa7f85e23a180c351b72 security-advisories@github.com
- https://github.com/langflow-ai/langflow/commit/94859df33acd70b2a1f816e26d68f5e89a7e5639 security-advisories@github.com
- https://github.com/langflow-ai/langflow/pull/13915 security-advisories@github.com
- https://github.com/langflow-ai/langflow/releases/tag/v1.10.3 security-advisories@github.com
- https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82 security-advisories@github.com
- https://github.com/langflow-ai/langflow/security/advisories/GHSA-4f6c-2vvp-gw82 134c704f-9b21-4f2e-91b3-4a467353bcc0