CVE-2026-21858 — exposed on the internet

CVE-2026-21858: CWE-20: Improper Input Validation in n8n-io n8n

Internet exposure observed by OffSeq scans · last 30 days

Found on 2 internet-exposed hosts by OffSeq scans; no in-the-wild exploitation has been observed against OffSeq honeypots in this window.

About CVE-2026-21858

n8n is an open source workflow automation platform. Versions starting with 1.65.0 and below 1.121.0 enable an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker, resulting in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. This issue is fixed in version 1.121.0.

Vendor: n8n-ioCWE-20

OffSeq internet scanning found CVE-2026-21858 on 2 exposed hosts in the last 30 days. OffSeq honeypots have not recorded in-the-wild exploitation of this CVE in the current window — this page tracks its exposure footprint and status; if exploitation begins, the live honeypot signal will appear here.

References