CVE-2026-7663

CRITICAL

IBM Langflow OSS 1.0.0-1.9.6 - Unauthenticated MCP Authorization Bypass

Title source: manual
STIX 2.1

Description

IBM Langflow OSS 1.0.0 through 1.9.6 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.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
https://www.ibm.com/support/pages/node/7277570

Scores

CVSS v3 9.1
EPSS 0.0026
EPSS Percentile 17.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-285 CWE-863
Status published
Products (2)
IBM/Langflow OSS 1.0.0 - 1.9.6
langflow/langflow 1.0.0 - 1.10.0
Published Jun 30, 2026
Tracked Since Jul 01, 2026