6.3Medium
CVE-2026-6599langflow-ai langflow Model Context Protocol Configuration API mcp_projects.py install_mcp_config injection
Description
A vulnerability was detected in langflow-ai langflow up to 1.8.3. The impacted element is the function get_client_ip/install_mcp_config of the file src/backend/base/langflow/api/v1/mcp_projects.py of the component Model Context Protocol Configuration API. Performing a manipulation of the argument X-Forwarded-For results in injection. The attack may be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| langflow | langflow | — | |
| langflow-ai | langflow | 1.8.0, 1.8.1, 1.8.2, 1.8.3 |
References and patches
- VDB-358234 | langflow-ai langflow Model Context Protocol Configuration API mcp_projects.py install_mcp_config injection vdb-entrytechnical-description
- VDB-358234 | CTI Indicators (IOB, IOC, TTP, IOA) signature
- Submit #791922 | Langflow <= 1.8.3 Authentication Bypass by Spoofing third-party-advisory
- https://gist.github.com/chenhouser2025/a909c47316b7a0948ee68c109ab747a3 exploit