CVE-2026-110848: n8n 0 to before 1.123.83, 2.0.0 to before 2.41.4, 2.42.0 to before 2.42.1

Affected technology

n8n · 0 to before 1.123.83, 2.0.0 to before 2.41.4, 2.42.0 to before 2.42.1
n8n-io

Description’s affected range: before 1.123.83, 2.x 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) · Low privileges required · No user interaction required

What an attacker can do

Authenticated users can create nodes named __proto__ through the API and invoke the connect-nodes operation to pollute the global object prototype, disrupting the instance until restart. Vendor/CNA’s CVSS 4.0 assessment (base score 6.0/10) rates confidentiality and integrity impact as none; availability impact as high.