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TI-2026-06746 Aliases CVE-2026-7664GHSA-4pf4-j777-cgmf

Unauthenticated Flow Execution via Webhook Endpoint in Langflow OSS

Priority MEDIUM 49CWE-287Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

IBM Langflow OSS 1.0.0 through 1.8.4 could allow unauthenticated attackers to access protected MCP project resources and execute MCP operations due to improper authorization enforcement in the Streamable MCP transport endpoint.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00498 42nd 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
Yes
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
IBMLangflow OSS1.0.0 – 1.8.4—No fix listedCNA
  • Langflow OSS VendorIBM Affected 1.0.0 – 1.8.4 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*1.0.0 – 1.8.4VulnerableLangflow
  • cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:* Versions 1.0.0 – 1.8.4 Vulnerable ·Langflow

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-7664
  2. 2026-10-03 Alias added: GHSA-4pf4-j777-cgmf

References

Patch 1

  • 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