Authorization Bypass Vulnerability in IBM Langflow by IBM
CVE-2026-7664

9.8CRITICAL

Key Information:

Vendor

IBM
Status
Langflow Oss
Vendor
CVE Published:
22 June 2026

What is CVE-2026-7664?

IBM Langflow OSS versions 1.0.0 through 1.8.4 are susceptible to an authorization bypass vulnerability. This flaw allows unauthenticated attackers to gain unauthorized access to protected resources and execute operations within the MCP project due to improper enforcement of authorization measures at the Streamable MCP transport endpoint. Organizations utilizing these versions are urged to assess their security posture and implement necessary patches to mitigate the risks associated with this vulnerability.

Affected Version(s)

Langflow OSS 1.0.0 <= 1.8.4

References

https://www.ibm.com/support/pages/node/7277243
vendor-advisorypatch

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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