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    CVE-2026-56357

    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.

    Published:Jun 22, 2026
    Last Modified:Jun 23, 2026
    EPS:Jun 22, 2026
    EPSS Score:0.00186
    CVSS Score:4

    Affected Products

    Vendor
    N8n
    Product
    N8n

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-86995 (CVSS 5.3) — n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the Git node valida…
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    CVE-2026-85173 (CVSS 5.3) — n8n versions before 2.36.2 contain a missing per-project authorization vulnerability in the Insights API route…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High