CVE-2026-7664 — CRITICAL (9.8)

Q: How severe is CVE-2026-7664?

CVE-2026-7664 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Q: Is there a patch for CVE-2026-7664?

Check the references section above for vendor advisories and patch information. Affected products include: Langflow Langflow.

Vulnerability Description

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.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Langflow	Langflow	>= 1.0.0, <= 1.8.4

Related Weaknesses (CWE)

CWE-287

References

https://www.ibm.com/support/pages/node/7277243Vendor Advisory

FAQ

What is CVE-2026-7664?

CVE-2026-7664 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 Streama...

How severe is CVE-2026-7664?

CVE-2026-7664 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-7664?

Check the references section above for vendor advisories and patch information. Affected products include: Langflow Langflow.