CVE•Published 2026-01-08•1 article on news•5 live references•NVD data
CVE-2026-21877
Vulnerability data via CVEDB (Shodan)
CVSS v3.1
9.9
CRITICAL
EPSS percentile
93
Exploit Prediction Scoring System · top 7% 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
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-2026-21877Hosts 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-2026-21877Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-21877Censys host search filtered to this CVE id.
grep.app
CVE-2026-21877Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-21877GitHub code search for direct mentions.
Google dork
"CVE-2026-21877" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (8)
CVE-2026-218778 repos
nomi-sec/PoC-in-GitHubunknown
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
KingOfBugbounty/KingOfBugBountyTipsPython
Our main goal is to share tips from some well-known bughunters. Using recon methodology, we are able to find subdomains, apis, and tokens that are already exploitable, so we can re…
GenAI-Security-Project/GenAI-Red-Team-LabPython
Provides a collection of sandboxes, exploitation code, and tutorials that exemplifies GenAI Red Teaming exercises. It aims to help security researchers and developers test, probe, …
DarkFunct/TK-CVE-RepoPython
TK-CVE-Repo
her3ticAVI/n8kedShell
n8n auditing and post-exploitation framework
CPAtoCybersecurity/GRC_News_Assistant_3unknown
GRC News Assistant 3.0
Libertocrat/starPython
STAR is a secure automation runtime for workflows and AI agents that need predefined system-level actions without arbitrary shell execution.
magercode/List-CVE-2025-2026unknown
Daftar CVE 2025-2026 terupdate