Is CVE-2026-9186 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-9186?

CVE-2026-9186 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-9186

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.).