Vulnerability in Langflow-ai Langflow
CVE-2026-6599
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 Co…
EPSS: 0.001 (16.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Langflow-ai Langflow — versions 1.8.0, 1.8.1, 1.8.2
Weakness classification (CWE)
References
- VDB-358234 | langflow-ai langflow Model Context Protocol Configuration API mcp_projects.py install_mcp_config injection (technical-description, vdb-entry)
- VDB-358234 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
- Submit #791922 | Langflow <= 1.8.3 Authentication Bypass by Spoofing (third-party-advisory)
- cna@vuldb.com (exploit)
Frequently asked questions
- What is CVE-2026-6599?
- CVE-2026-6599 is a medium-severity vulnerability in Langflow-ai Langflow, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-04-20.
- How severe is CVE-2026-6599?
- Medium severity. CVSS v3 base score is 6.3 out of 10.