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).
History

Mon, 27 Jul 2026 23:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284
CWE-287

Wed, 22 Jul 2026 02:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284
CWE-287

Tue, 21 Jul 2026 17:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-306

Sat, 18 Jul 2026 00:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 17 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
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).
Title Authentication Bypass in Webhook Endpoints Allowed Unauthorized Flow Execution
First Time appeared Ibm
Ibm langflow Oss
CPEs cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:langflow_oss:1.10.0:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm langflow Oss
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: ibm

Published: 2026-07-17T19:06:00.986Z

Updated: 2026-07-23T03:56:06.902Z

Reserved: 2026-05-13T22:04:50.617Z

Link: CVE-2026-8505

cve-icon Vulnrichment

Updated: 2026-07-17T20:06:21.249Z

cve-icon NVD

No data.

cve-icon Redhat

No data.