GitHub Advisoryadvisory · PyPI

GHSA-v66p-f7x3-4794 Langflow vulnerable to injection

LOW Published 2026-04-20 Modified 2026-04-28 Official page ↗
Aliases
CVE-2026-6599
Ecosystem
PyPI
Packages
langflow
Severity
Low
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Weaknesses
CWE-74
Reviewed
2026-04-28

Affected packages

• PyPI langflow: <= 1.8.3 (no fix yet)

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.

Related

Alias · CVE (1)

  • CVE-2026-6599 A vulnerability was detected in langflow-ai langflow up to 1.8.3. vulnerability

Weakness · CWE (1)

  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component weakness

References