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CVE-2026-59206

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

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.1 · High · EPSS 0.7% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • n8n

    Versions
    • >= 2.28.0, < 2.28.1: Affected
    • >= 2.0.0-rc.0, < 2.27.4: Affected
    • < 1.123.61: Affected

    No fix published

  • n8n npm

    Affected ranges
    • SEMVER: < 1.123.61

    Update to 1.123.61

  • n8n npm

    Affected ranges
    • SEMVER: ≥ 2.28.0, < 2.28.1

    Update to 2.28.1

  • n8n npm

    Affected ranges
    • SEMVER: ≥ 2.0.0-rc.0, < 2.27.4

    Update to 2.27.4

Original sources

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