What happened
Unauthenticated RCE in n8n via file read and expression injection sandbox bypass.
Affected versions
Windows 10 Version 1809: 10.0.17763.0 through before 10.0.17763.9245 (custom); 10.0.19044.0 through before 10.0.19044.7725 (custom); 10.0.19045.0 through before 10.0.19045.7725 (custom); 10.0.22631.0 through before 10.0.22631.7582 (custom); 10.0.26100.0 through before 10.0.26100.9445 (custom); 10.0.26200.0 through before 10.0.26200.9445 (custom); 10.0.28000.0 through before 10.0.28000.2954 (custom); 10.0.20348.0 through before 10.0.20348.5622 (custom); 10.0.26100.0 through before 10.0.26100.33438 (custom) 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
SploitusUnauthenticated 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.ZeroDayEvil2026-09-12T00:10:10VerifiedSploitusAD CS Certighost: CA issues DC cert via spoofed identity enabling full domain compromise.ZeroDayEvil2026-09-11T23:13:58VerifiedZeroDayEvil/CVE-2026-54121-CertighostAD CS Certighost: CA issues DC cert via spoofed identity enabling full domain compromise.ZeroDayEvil2026-09-11T23:13:58VerifiedSource timeline
Discovered through SploitusView source ↗
CVE record published by NVDView source ↗
Record history
Record created from the first normalized source observation.
Metadata and source references refreshed.