What is CVE-2026-8446?

CVE-2026-8446 is a high-severity vulnerability in Ibm Langflow Oss, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-08-05.

How severe is CVE-2026-8446?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Ibm Langflow Oss

CVE-2026-8446

IBM Langflow OSS 1.0.0 through 1.10.3 contain an authentication bypass vulnerability in the Model Context Protocol (MCP) composer endpoint when mcp_composer_enabled=true (default) and projects are configured with auth_type=oauth .

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Ibm Langflow Oss — versions 1.0.0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-8446?: CVE-2026-8446 is a high-severity vulnerability in Ibm Langflow Oss, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-08-05.
How severe is CVE-2026-8446?: High severity. CVSS v3 base score is 7.5 out of 10.