CVE-2026-56357EPSS p8.4%

CVE-2026-56357CVE-2026-56357

n8n / n8n

Description

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.

Scoring

CVSS 4.0 ()
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
EPSS0.19% probability of exploitation · percentile 8.4% · 2026-08-08T12:02:54Z
Last modified2026-06-24
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.