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CVE-2026-9186

nvd nist
Published: Sep 4, 2026Modified: Sep 8, 2026

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6.5
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Exploitability: 2.8 / Impact: 3.6
Source: psirt@us.ibm.com (Secondary)

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.).

Affected (1)

Products: Langflow: Langflow
Langflow
1 product
Langflow
Configuration A
1 vulnerable · 3 platform
Vulnerable SoftwareAffected Versions
Langflow
From 1.0.0 to 1.11.3
Running on/withPlatform Versions
Apple
Macos
All versions
Linux
Linux Kernel
All versions
Microsoft
Windows
All versions

Related CWEs

CWE-284
Improper Access Control
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

References (1)

Source: psirt@us.ibm.com
PatchVendor Advisory

Timeline

No history available yet.