CVE-2026-9186

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.).

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.ibm.com/support/pages/node/7285646	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*

OR	cpe:2.3:o:apple:macos:-:::::::*
	cpe:2.3:o:linux:linux_kernel:-:::::::*
	cpe:2.3:o:microsoft:windows:-:::::::*

History

No history.

Information

Published : 2026-09-04 15:17

Updated : 2026-09-08 21:45

NVD link : CVE-2026-9186

Mitre link : CVE-2026-9186

CVE.ORG link : CVE-2026-9186

JSON object : View

Products Affected

langflow

langflow

linux

linux_kernel

microsoft

windows

apple

macos

CWE

CWE-284

Improper Access Control

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