Vulnerability intelligence

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.

CVSS Score

Critical

EPSS — Exploit Probability

78%

Riskier than 100% of all CVEs · checked 2026-09-06

Exploitation

Not in CISA KEV

KEV does not include every exploited vulnerability

Remediation

Patch available

Vendor fix published

NVD entry Vendor patch PoC / advisory