IBM Langflow OSS 1.0.01.10.3 Auth Bypass via MCP composer endpoint (default enabled)
CVE-2026-8446 Published on August 5, 2026
Langflow is affected by security vulnerabilities in Model Context Protocol features
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 Analysis
CVE-2026-8446 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
Missing Authentication for Critical Function
The software does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
Products Associated with CVE-2026-8446
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Affected Versions
IBM Langflow OSS:- Version 1.0.0, <= 1.10.3 is affected.