CVE•Published 2026-01-08•1 article on news•5 live references•NVD data
CVE-2026-21858
Vulnerability data via CVEDB (Shodan)
CVSS v3.1
10.0
CRITICAL
EPSS percentile
99
Exploit Prediction Scoring System · top 1% of all CVEs
Description
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.
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-2026-21858Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"N8n N8n" version:"1.100.0"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-2026-21858Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-21858Censys host search filtered to this CVE id.
grep.app
CVE-2026-21858Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-21858GitHub code search for direct mentions.
Google dork
"CVE-2026-21858" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (8)
CVE-2026-218588 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…
Threekiii/Awesome-POCJava
一个漏洞 PoC 知识库。A knowledge base for vulnerability PoCs(Proof of Concept), with 1k+ vulnerabilities.
0xMarcio/cvePython
Latest CVEs with their Proof of Concept exploits.
GhostTroops/TOPShell
TOP All bugbounty pentesting CVE-2023- POC Exp RCE example payload Things
Chocapikk/CVE-2026-21858Python
n8n Ni8mare - Unauthenticated Arbitrary File Read to RCE Chain (CVSS 10.0)
Threekiii/CVEunknown
一个 CVE 漏洞预警知识库，无 exp/poc，部分包含修复方案。A knowledge base of CVE security vulnerability, no PoCs/exploits.
killvxk/gitweeklyC
收集各种有趣的github项目