CVE-2026-8505: Langflow

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users to trigger the execution of any flow. The system incorrectly bypasses API key validation when the WEBHOOK_AUTH_ENABLE configuration is set to False (which is the default setting). This allows a remote attacker who knows a flow's UUID to execute it as if they were the owner, potentially leading to Remote Code Execution (RCE).

Affected products

• Langflow Langflow: from 1.0.0, before 1.10.1 (fixed in 1.10.1)

Published 2026-07-17. Last modified 2026-07-23.