Vulnerability · Published Aug 11, 2026 · Assigned by VulnCheck

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

High 7.1

In plain English

A high-severity prototype pollution in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.6%top 52.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	n8n	1.123.67	GHSA-xwx6-jjhv-84p8
npm	n8n	2.32.1	GHSA-xwx6-jjhv-84p8
npm	n8n	2.31.5	GHSA-xwx6-jjhv-84p8

Affected products (as reported)

Vendor	Product	Versions
n8n-io	n8n	0 – before 1.123.67
n8n-io	n8n	2.32.0 – before 2.32.1
n8n-io	n8n	2.0.0-rc.0 – before 2.31.5

Weakness: CWE-1321 · 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

References

GitHub Security Advisory (GHSA-xwx6-jjhv-84p8) vendor-advisory
VulnCheck Advisory: n8n before 1.123.67 Prototype Pollution via Edit Fields third-party-advisory