CVE-2026-42231
n8n: Prototype Pollution in XML Webhook Body Parser Leads to RCE
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1321 |
| Vendor | n8n-io |
| Product | n8n |
| Published | May 4, 2026 |
| Last Updated | May 4, 2026 |
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Affected Versions
n8n-io / n8n
< 1.123.32 >= 2.17.0, < 2.17.4 >= 2.18.0, < 2.18.1