High severity8.8GHSA Advisory· Published May 4, 2026· Updated May 6, 2026
CVE-2026-42231
CVE-2026-42231
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
n8nnpm | < 1.123.32 | 1.123.32 |
n8nnpm | >= 2.18.0, < 2.18.1 | 2.18.1 |
n8nnpm | >= 2.17.0, < 2.17.4 | 2.17.4 |
Affected products
2Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-q5f4-99jv-pgg5ghsaADVISORY
- github.com/n8n-io/n8n/security/advisories/GHSA-q5f4-99jv-pgg5nvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-42231ghsaADVISORY
News mentions
2- ⚡ Weekly Recap: Exchange 0-Day, npm Worm, Fake AI Repo, Cisco Exploit and MoreThe Hacker News · May 18, 2026
- Ivanti, Fortinet, SAP, VMware, n8n Patch RCE, SQL Injection, Privilege Escalation FlawsThe Hacker News · May 18, 2026