CVE-2026-59206: n8n

High severity, CVSS 7.1. EPSS: 0.7% chance of exploitation in the next 30 days.

n8n is an open source workflow automation platform. Prior to 1.123.61, 2.27.4, and, 2.28.1, an authenticated user with the default workflow:create permission could pollute Object.prototype through a crafted workflow saved, updated, or imported via the workflow API, allowing unauthenticated requests to be treated as a privileged user and exposing user and project listing endpoints. This issue is fixed in versions 1.123.61, 2.27.4, and 2.28.1.

Affected products

• n8n n8n: before 1.123.61 (fixed in 1.123.61); from 2.0.0, before 2.27.4 (fixed in 2.27.4); version 2.28.0 only

Published 2026-07-09. Last modified 2026-07-09.