CVE-2026-8505

CriticalCVSS 9.8/10Last modified Oct 24, 2026

Description

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).

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-306

Affected software

Vendor	Product	Versions
IBM	Langflow OSS	>= 1.0.0, <= 1.10.0

References

https://www.ibm.com/support/pages/node/7278921Vendor Advisory

Timeline

Published: Jul 17, 2026
Last modified: Oct 24, 2026
NVD status: Modified

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