CVE-2026-9186
IBM Langflow OSS 1.0.0 through 1.11.2 allows remote authenticated attackers to bypass localhost-only MCP configuration installation by spoofing X-Forwarded-For: 127.0.0.1 header, enabling arbitrary writes to IDE config files (~/.cursor/mcp.json, etc.).
- Published Sep 4, 2026
- CVSS 6.5 medium
- 0.4% chance of exploitation in the next 30 days (EPSS)
- A fix is available