What’s Vulnerable › Vulnerabilities
CVE-2026-8446: Langflow is affected by security vulnerabilities in Model Context Protocol features
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-05 · updated 2026-10-24
- Weakness: CWE-306
Description
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 products
- IBM Langflow OSS: from 1.0.0 before 1.11.0 — fixed in 1.11.0
How to fix
Upgrade to a fixed version: IBM Langflow OSS 1.11.0. Check the vendor advisory for mitigations.
References
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