CVE-2026-21877

Critical

Published: 08/01/2026(UTC)Translated: 05/08/2026(UTC)NVD NIST

Summary

In n8n versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service. This could result in full compromise and can impact both self-hosted and n8n Cloud instances. This issue is fixed in version 1.121.3. Administrators can reduce exposure by disabling the Git node and limiting access for untrusted users, but upgrading to the latest version is recommended.

Risk Assessment

An attacker can gain full control over the n8n instance, potentially leading to data breaches and further attacks.

Recommendation

Upgrade n8n to version 1.121.3 or later and consider disabling the Git node and limiting access for untrusted users.

Original NVD description (English source)

n8n is an open source workflow automation platform. In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service. This could result in full compromise and can impact both self-hosted and n8n Cloud instances. This issue is fixed in version 1.121.3. Administrators can reduce exposure by disabling the Git node and limiting access for untrusted users, but upgrading to the latest version is recommended.