---
id: CVE-2026-8505
title: >-
  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
summary: >-
  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_A…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
published: '2026-07-17'
updated: '2026-07-18'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-8505'
references:
  - url: 'https://www.ibm.com/support/pages/node/7278921'
    label: psirt@us.ibm.com
tags:
  - nvd
epss: 0.01041
epssPercentile: 0.62471
ingestedAt: '2026-07-18T21:25:08.073Z'
---

## Overview

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).

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.