CVE-2026-8505: Authentication Bypass in Webhook Endpoints Allowed Unauthorized Flow Execution

Published Jul 2, 2026
·
Updated

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

Affected Software

6 affected components
IBM Langflow OSS>=1.0.0<=1.10.0
IBM Langflow OSS<=1.0.0-1.10.0
All of the following
Langflow Langflow>=1.0.0<1.10.1
Any of the following
Apple macOS
Linux Linux kernel
Microsoft Windows

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade langflow OSS to a version that resolves this vulnerability.

    Fixed in 1.10.1
  2. Configuration

    Set WEBHOOK_AUTH_ENABLE to True to prevent bypass of API key validation in webhook endpoints.

    Langflow webhook authentication WEBHOOK_AUTH_ENABLE = True

Event History

Jul 2, 2026
CVE Published
via IBM·12:00 AM
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software
Jul 17, 2026
CVE Published
via MITRE·07:06 PM
Data Sourced
via MITRE·07:06 PM
RemedyDescriptionSeverity
Data Sourced
via NVD·08:17 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2026-8505?

The severity of CVE-2026-8505 is critical, rated at 9.8.

2

What kind of vulnerability is CVE-2026-8505?

CVE-2026-8505 is an authentication bypass vulnerability that allows unauthorized flow execution.

3

How can I protect my system from CVE-2026-8505?

To protect your system from CVE-2026-8505, upgrade to the latest version of IBM Langflow OSS that has addressed this vulnerability.

4

What software is affected by CVE-2026-8505?

CVE-2026-8505 affects IBM Langflow OSS versions 1.0.0 through 1.10.0.

5

When was CVE-2026-8505 published?

CVE-2026-8505 was published on July 2, 2026.

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