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Vulnerabilitycritical

New Vulnerability in n8n

Schneier on Securityby Bruce Schneier ()1 min read4 · 2 reads
Read at schneier.com
Analyze CVE-2026-21858 with Vani AIImpact, affected versions, exploitation, mitigations and detection
CVEs
CVE-2026-21858
Tags
cve-2026-21858vulnerability

Vulnerabilities mentioned

All
CVEVulnerabilityCVSSEPSSSignalsPublished
CVE-2026-21858
Unauthenticated RCE in n8n Workflow Automation (Ni8mare)
10.078%PoC ×2

From the original article

1 min read at schneier.com

We discovered a critical vulnerability ( CVE-2026-21858, CVSS 10. 0 ) in n8n that enables attackers to take over locally deployed instances, impacting an estimated 100,000 servers globally. No official workarounds are available for this vulnerability.

Schneier on Security

By Bruce Schneier · schneier.com

Read the full article at Schneier on Security

A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.