CVE-2026-54312CWE-1321

n8n: Microsoft SQL Node Prototype Pollution

High · published June 23, 2026

CVSS v4.0
7.2
EPSS
0%
Percentile
32.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.2 · HIGH
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
EPSS
0.00396 · 32.6th percentile
Weakness
CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Published
2026-06-23T15:33Z
EPSS history
Timeline
  • 23 JUN 15:33Z
    n8n: Microsoft SQL Node Prototype Pollution
    cvelistv5