n8n has XML Node Prototype Pollution that to RCE
Critical9.9CVE-2026-42232 · Published Apr 29, 2026 · updated May 8, 2026
## Impact An authenticated user with permission to create or modify workflows could achieve global prototype pollution via the XML Node leading to RCE when combined with other nodes exploiting the prototype pollution. ## Patches The issue has been fixed in n8n versions 1.123.32, 2.17.4, and 2.18.1. Users should upgrade to one of these versions or later to remediate the vulnerability. ## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Limit workflow creation and editing permissions to fully trusted users only. - Disable the XML node by adding `n8n-nodes-base.xml` to the `NODES_EXCLUDE` environment variable. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| n8n npm | >= 2.18.0, < 2.18.1 | 2.18.1 |
| >= 2.17.0, < 2.17.4 | 2.17.4 | |
| < 1.123.32 | 1.123.32 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-1321
- Also known as
- CVE-2026-42232
More n8n advisories
All n8n| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Apr 29 | n8n has Prototype Pollution in XML Webhook Body Parser that Leads to RCE Critical10.0Apr 29 | Critical10.0 | 1.123.32+2 more |
| Apr 29 | n8n Vulnerable to XSS via MCP OAuth clientHigh8.2Apr 29 | High8.2 | 1.123.32+2 more |
| Apr 29 | n8n's Credential Authorization Bypass in dynamic-node-parameters Allows Foreign API Key ReplayHigh8.5Apr 29 | High8.5 | 1.123.33+1 more |
| Apr 29 | n8n has a Python Task Runner Sandbox Escape VulnerabilityHigh7.5Apr 29 | High7.5 | 1.123.32+2 more |
| Apr 29 | n8n has Public API Variables IDOR that Allows Cross-Project Secret DisclosureMedium7.7Apr 29 | Medium7.7 | 1.123.32+2 more |
| Apr 29 | n8n Vulnerable to Unauthenticated Denial of Service via MCP Client RegistrationHigh7.5Apr 29 | High7.5 | 1.123.32+2 more |