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CVE-2026-8505

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

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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).

CVSS 9.8 · Critical · EPSS 0.7% · Public exploit · Fix available

Published
Updated

Stack: python

Affected products and versions

  • langflow oss

    Versions
    • ≥ 1.0.0, ≤ 1.10.0: Affected (semver)

    No fix published

  • langflow PyPI

    Versions
    • 1.7.0
    • 1.7.1
    • 1.7.2
    • 1.7.3
    • 1.8.0
    • 1.8.0rc0
    • 1.8.0rc1
    • 1.8.0rc2
    • 1.8.0rc3
    • 1.8.0rc4
    • 1.8.0rc5
    • 1.8.0rc6
    • 1.8.1
    • 1.8.2
    • 1.8.3
    • 1.8.3rc0
    • 1.8.4
    • 1.9.0
    Affected ranges
    • ECOSYSTEM: ≥ 1.7.0, < 1.9.1

    Update to 1.9.1

Original sources

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