CVE-2026-56357mediumCWE-290

CVE-2026-56357: fallo de gravedad media en n8n

n8n - Webhook Forgery via Missing HMAC-SHA256 Signature Verification in GitHub Webhook Trigger

Publicada el · Actualizada el

Seguir esta CVE+ Monitorear n8n+ Monitorear n8n

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

13Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 6.3epss 0.3%
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:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
Productos afectados
n8n · n8n
CVEs relacionadas — n8n

En el mismo producto, de las más peligrosas a las menos.

CVE-2026-59257MEDIUMn8n - SQL Injection in MySQL v1 executeQuery Operation via Expression InterpolationEPSS 0.6%CVE-2025-71380HIGHn8n - Arbitrary Command Execution via Execute Command NodeEPSS 0.6%CVE-2026-56348MEDIUMn8n - Credential Exfiltration via Allowed HTTP Request Domains Bypass in Dynamic Node Parameters EndpointEPSS 0.5%CVE-2026-56349MEDIUMn8n - Guardrail Node Bypass via Crafted InputEPSS 0.5%CVE-2026-59259MEDIUMn8n - Permission Bypass via Expression Parser Mismatch in External SecretsEPSS 0.4%CVE-2026-58661MEDIUMn8n - Disk Space Exhaustion via Data-Table File Upload EndpointEPSS 0.4%