CVE-2026-126389
MEDIUM
NVD
CVSS Score
5.4
Severity
MEDIUM
Published
Nov 13, 2026
Vendor
unknown
Description
n8n before 1.123.89 contains an authentication bypass vulnerability in the Chat Trigger that allows unauthenticated attackers to skip n8n User Auth through the setup GET webhook route in embedded chat mode. Attackers can send unauthenticated GET requests to the chat webhook URL to read named session conversation history or trigger workflows with attacker-supplied input.