What happened
n8n contains an improper control of dynamically managed code resources vulnerability in its workflow expression evaluation system that allows for remote code execution.
Affected versions
n8n: >= 0.211.0, < 1.120.4; = 1.121.0 Fixed: See vendor advisory.
Why it matters
This source correlation may provide earlier visibility while structured CVE metadata is still being updated.
Detection & mitigation
- Review the original advisory and validate affected versions.
- Apply vendor-provided updates or mitigations when available.
Public PoC references
RepositoryAuthorFirst seenReference
www.akamai.comNVD reference2025-12-19VerifiedSploitusUnauthenticated RCE in n8n via file read and expression injection sandbox bypass.ZeroDayEvil2026-09-12T00:10:10VerifiedZeroDayEvil/CVE-2026-21858-n8n-FullChainUnauthenticated RCE in n8n via file read and expression injection sandbox bypass.ZeroDayEvil2026-09-12T00:10:10VerifiedSource timeline
Discovered through CISA Known Exploited VulnerabilitiesView source ↗
CVE record published by NVDView source ↗
Added to CISA Known Exploited Vulnerabilities catalogView source ↗
Record history
Record created from the first normalized source observation.
Metadata and source references refreshed.