CVE-2026-7663

Critical

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.

SeverityCritical

CVSS9.1

Exploit probability—

Product

Langflow

PublishedJun 30, 2026

First seenJun 30, 2026

Weakness typeCWE-285CWE-285

How to fix

Update

langflow langflow1.10.0 or later

Patches

ibm.com/support/pages/node/7277570

Affected products

Product	Affected versions	Fixed in
langflow langflow	1.0.0 ≤ v < 1.10.0	1.10.0

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