Vulnerability · Published Jun 23, 2026 · Assigned by GitHub_M

CVE-2026-54312n8n: Microsoft SQL Node Prototype Pollution

High 7.2

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 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.2High

Exploit odds (30 days)0.4%top 66.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

n8n is an open source workflow automation platform. Prior to 2.24.0, an authenticated user with permission to create or modify workflows could achieve global prototype pollution via the Microsoft SQL node by supplying a crafted value as the table parameter. This pollutes Object.prototype process-wide for the lifetime of the n8n server process, causing application-wide validation failures and rendering the n8n instance completely non-functional until restarted. This vulnerability is fixed in 2.24.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	n8n	2.24.0	GHSA-x6p3-m6h9-fx7r

Affected products (as reported)

Vendor	Product	Versions
n8n-io	n8n	< 2.24.0

Weakness: CWE-1321 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-x6p3-m6h9-fx7r x_refsource_CONFIRM