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CVE-2026-42231

CVE-2026-42231 · n8n: Prototype Pollution in XML Webhook Body Parser Leads to RCE

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

n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, a flaw in the xml2js library used to parse XML request bodies in n8n's webhook handler allowed prototype pollution via a crafted XML payload. An authenticated user with permission to create or modify workflows could exploit this to pollute the JavaScript object prototype and, by chaining the pollution with the Git node's SSH operations, achieve remote code execution on the n8n host. This issue has been patched in versions 1.123.32, 2.17.4, and 2.18.1.

CVSS 9.4 · Critical · EPSS 0.9% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • n8n

    Versions
    • < 1.123.32: Affected
    • >= 2.17.0, < 2.17.4: Affected
    • >= 2.18.0, < 2.18.1: Affected

    No fix published

  • n8n npm

    Affected ranges
    • SEMVER: < 1.123.32

    Update to 1.123.32

  • n8n npm

    Affected ranges
    • SEMVER: ≥ 2.18.0, < 2.18.1

    Update to 2.18.1

  • n8n npm

    Affected ranges
    • SEMVER: ≥ 2.17.0, < 2.17.4

    Update to 2.17.4

Original sources

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