VulnerabilityAnalyzed

CVE-2026-21877

In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service.

CRITICAL 9.9EPSS 5.45%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (5.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.1: 9.9 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS: 5.45% probability · 92th percentile
CISA KEV: Not listed
Weakness: CWE-94, CWE-434
Affected: n8n/n8n
Source: security-advisories@github.com

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.