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CVE-2026-56357

CVE-2026-56357 · n8n - Webhook Forgery via Missing HMAC-SHA256 Signature Verification in GitHub Webhook Trigger

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

n8n before 1.123.15 and 2.5.0 contains a webhook forgery vulnerability in the GitHub Webhook Trigger node that fails to implement HMAC-SHA256 signature verification. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary data, spoofing GitHub webhook events.

CVSS 6.3 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • n8n

    Versions
    • ≥ 0, < 1.123.15: Affected (semver)
    • 1.123.15: Not affected (semver)
    • ≥ 2.0.0, < 2.5.0: Affected (semver)
    • 2.5.0: Not affected (semver)

    Update to 1.123.15; Update to 2.5.0

  • n8n npm

    Affected ranges
    • SEMVER: < 1.123.15

    Update to 1.123.15

  • n8n npm

    Affected ranges
    • SEMVER: ≥ 2.0.0, < 2.5.0

    Update to 2.5.0

Original sources

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