TI-2026-08075 Aliases CVE-2026-9186 GHSA-gqfh-c8pj-64mr

Improper access control in IBM Langflow OSS

LOW 29CWE-284Published 2026-09-04 · Updated 2026-09-08

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · High · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

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.).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00382 32nd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
IBM	Langflow OSS	1.0.0 – 1.11.2	—	No fix listed	CNA

Langflow OSS VendorIBM Affected 1.0.0 – 1.11.2 Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:langflow:langflow::::::::	1.0.0 to before 1.11.3	Vulnerable	Langflow
cpe:2.3:o:apple:macos:-:::::::*	not specified by NVD	Running on	Apple
cpe:2.3:o:linux:linux_kernel:-:::::::*	not specified by NVD	Running on	Linux
cpe:2.3:o:microsoft:windows:-:::::::*	not specified by NVD	Running on	Microsoft

cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:* Versions 1.0.0 to before 1.11.3 Vulnerable ·Langflow
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2026-09-04
IBM Langflow OSS — ibm.com/support/pages/node/7285646
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-07424 Cross-site scripting in IBM Langflow OSSPriority LOW 27
Show all 2 records → Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-9186
2026-10-03 Alias added: GHSA-gqfh-c8pj-64mr

References

Patch 1

https://www.ibm.com/support/pages/node/7285646

TI-2026-08085 Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation KEVCVSS 3.1CRITICAL 9.8
TI-2022-23774 IBM Aspera Faspex code execution KEVCVSS 3.1CRITICAL 9.8
TI-2020-03794 Improper authentication in IBM Data Risk Manager KEVCVSS 3.1CRITICAL 9.8
TI-2019-03441 Code injection in IBM Planning Analytics KEVCVSS 3.1CRITICAL 9.8
TI-2017-03639 Improper handling of exceptional conditions in Apache Struts KEVCVSS 3.1CRITICAL 9.8
TI-2015-06198 Serialized-object interfaces in certain IBM analytics, business solutions, cognitive, IT… KEVCVSS 3.1CRITICAL 9.8

See all 9711 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences