CVE-2026-21877
CRITICALCVSS v3
9.9
CRITICAL
EPSS Score
12.5%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 1/8/2026
- Last Modified
- 1/20/2026
Frequently Asked Questions
What is CVE-2026-21877?
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.
Is CVE-2026-21877 actively exploited?
Active exploitation of CVE-2026-21877 has not been confirmed. The EPSS score is 12.5%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-21877?
CVE-2026-21877 has a CVSS v3 base score of 9.9 (CRITICAL severity), with vector string 3.1.
Is CVE-2026-21877 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.