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CVE-2026-42231

n8n: Prototype Pollution in XML Webhook Body Parser Leads to RCE PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
n8n-io / n8naffected < 1.123.32; affected >= 2.17.0, < 2.17.4; affected >= 2.18.0, < 2.18.1

CWE

CWE-1321

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.