Vulnerability DatabaseCVE-2026-8446
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CVE-2026-8446
Published:August 05, 2026
Updated:August 31, 2026
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 .
Affected Packages
langflow (CONDA):
Affected version(s) >=1.10.1 <1.11.1
Fix Suggestion:
Update to version 1.11.1
langflow (PYTHON):
Affected version(s) >=1.0.0 <1.11.0
Fix Suggestion:
Update to version 1.11.0
Related Resources (1)
https://www.ibm.com/support/pages/node/7282147
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Missing Authentication for Critical Function
CWE-306
EPSS
Base Score:
0.28