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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-59206

n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

n8n-io n8n

  • >= 2.28.0, < 2.28.1affected
  • >= 2.0.0-rc.0, < 2.27.4affected
  • < 1.123.61affected

References