CVE-2026-59206 – n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration

CVE ID :CVE-2026-59206

Published : July 9, 2026, 3:30 p.m. | 18 minutes ago

Description :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.

Severity: 0.0 | NA

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