CVE-2026-8446 Langflow is affected by security vulnerabilities in Model Context Protocol features
Attackers can bypass authentication in the MCP composer endpoint of Langflow OSS, potentially accessing protected features without credentials.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8446?
CVE-2026-8446 is a high-severity authentication bypass vulnerability in Langflow Langflow, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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 .
Weakness: CWE-306
Which versions are affected by CVE-2026-8446?
It affects 1 product.
Products include Langflow Langflow.
How do I fix CVE-2026-8446?
No fix has been published for CVE-2026-8446 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-8446 being exploited?
There is no known exploitation of CVE-2026-8446 in the wild and no public exploit code.