CVE-2026-9186

—

CVSS 3.1

6.5 medium

EPSS

<1%p19

Published

Sep 4, 2026 (11d ago)

Modified

Sep 8, 2026

Description

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.).

Vendors: langflow
Products: langflow
Weakness: CWE-284
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

NVD CVE.org GitHub PoCs EPSS (0.3%)

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