Unauthenticated Webhook RPC RCE in IBM Langflow 1.0.01.10.0
CVE-2026-8505 Published on July 17, 2026
Authentication Bypass in Webhook Endpoints Allowed Unauthorized Flow Execution
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).
Vulnerability Analysis
CVE-2026-8505 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Products Associated with CVE-2026-8505
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Affected Versions
IBM Langflow OSS:- Version 1.0.0, <= 1.10.0 is affected.