CVE-2026-44791CWE-1321

n8n: XML Node Prototype Pollution Patch Bypass

Critical · published June 23, 2026

CVSS v4.0
9.4
EPSS
1%
Percentile
44.5
In the wild
Unconfirmed
What it is

n8n is an open source workflow automation platform. Prior to 1.123.43, 2.22.1, and 2.20.7, an authenticated user with permission to create or modify workflows could bypass the patch for CVE-2026-42232 in the XML node. When combined with other nodes, this could lead to RCE on the n8n host. This vulnerability is fixed in 1.123.43, 2.22.1, and 2.20.7.

The record
Technical detail
CVSS v4.0
9.4 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS
0.00537 · 44.5th percentile
Weakness
CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Published
2026-06-23T15:54Z
EPSS history
Timeline
  • 23 JUN 15:54Z
    n8n: XML Node Prototype Pollution Patch Bypass
    cvelistv5