CVE-2026-7663: 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…

PriorityP264critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

0.52%

43.2th percentile

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
ibm	langflow_oss	1.0.0 – 1.9.6	—
langflow	langflow	>= 1.0.0 < 1.10.0	1.10.0

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