CVE-2026-118678 n8n before 2.41.4 and 2.42.1 Prototype Pollution DoS via Workflow History Compaction

n8n before 2.41.4 and 2.42.x before 2.42.1 contains a prototype pollution vulnerability that allows low-privileged users to alter built-in object behaviour by saving workflows with specially named connection keys. Attackers can add keys such as proto to workflow connections, which the periodic...