CVE-2026-7664
published 2026-06-22CVE-2026-7664: 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…
PriorityP263critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.28%
19.4th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| ibm | langflow_oss | 1.0.0 – 1.8.4 | — |
| langflow | langflow | 1.0.0 – 1.8.4 | — |
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GHSA
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 Streama
ghsa_unreviewed·2026-06-22
CVE-2026-7664 [CRITICAL] CWE-287 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 Streama
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.
VulDB
IBM Langflow OSS up to 1.8.4 Streamable MCP Transport Endpoint improper authentication
vuldb·2026-06-22·CVSS 9.8
CVE-2026-7664 [CRITICAL] IBM Langflow OSS up to 1.8.4 Streamable MCP Transport Endpoint improper authentication
A vulnerability was found in IBM Langflow OSS up to 1.8.4. It has been rated as critical. This affects an unknown part of the component Streamable MCP Transport Endpoint. This manipulation causes improper authentication.
This vulnerability is registered as CVE-2026-7664. Remote exploitation of the attack is possible. No exploit is available.
Upgrading the affected component is advised.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-06-22
Published