CVE-2026-110843: n8n 0 to before 2.41.4, 2.42.0 to before 2.42.1

Affected technology

n8n · 0 to before 2.41.4, 2.42.0 to before 2.42.1
n8n-io

Description’s affected range: before 2.41.4 and 2.42.x before 2.42.1

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Unauthenticated attackers can send identifiers differing only in their query string to create unlimited first-party client records that bypass the registration cap, growing the database until the disk fills. Vendor/CNA’s CVSS 4.0 assessment (base score 8.2/10) rates confidentiality and integrity impact as none; availability impact as high.