CVE•Published 2026-01-08•1 article on news•6 live references•NVD data

CVE-2026-21877

Vulnerability data via CVEDB (Shodan)

CVSS v3.1

9.9

CRITICAL

EPSS percentile

Exploit Prediction Scoring System · top 8% of all CVEs

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.

Timeline

Published 2026-01-08

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-21877

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product + version

product:"N8n N8n" version:"0.123.0"

Version-pinned fingerprint from NVD's first vulnerable CPE.

Shodan · banner/body mention

http.html:"N8n"

HTTP body or banner mentions "N8n" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-21877