Unrated severityNVD Advisory· Published Jun 30, 2026· Updated Jul 1, 2026
Unauthenticated Cross-User MCP Resource Access and Tool Execution via Streamable Transport Authorization Bypass
CVE-2026-7663
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.
Affected products
1- Range: 1.0.0 - 1.9.6
Patches
Vulnerability mechanics
References
1- www.ibm.com/support/pages/node/7277570mitrevendor-advisorypatch
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