CVE-2026-21877: n8n is vulnerable to Remote Code Execution via Arbitrary File Write
n8n-io · n8n
Affected: n8n-io · Exploitation: check available, not yet exploited
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 92% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- n8n-io · n8n< 1.121.3
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
- CISA KEV
- Not listed
- Public check
- n8n >= 0.123.0 and < 1.121.3 - Remote Code Execution · nuclei template in projectdiscovery/nuclei-templates
- Vendor
- n8n-io
- Published
- January 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-21877 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.