CVE-2026-7664

CRITICAL EPSS 19.4%

Published Jun 22, 20261w ago · Modified Jun 23, 20261w ago

9.8 CVSS 3.1

Critical

Published Jun 22, 2026 1w ago

Last Modified Jun 23, 2026 1w ago

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 Details

Base Score

9.8

Exploitability

3.9

Impact

5.9

Vector string

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

Threat Intelligence

EPSS Exploit Probability

19.4% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-287 Improper Authentication Authentication

References 1

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.