CVE-2026-8446

EUVD-2026-53465
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 .
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 21.2%
Affected Products (NVD)
VendorProductVersion
langflowlangflow
1.0.0 ≤
𝑥
< 1.11.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://www.ibm.com/support/pages/node/7282147