by Kastro
Paper/Archive/CVE-2026-44791

CVE-2026-44791

n8n-io n8n — n8n: XML Node Prototype Pollution Patch Bypass

EPSS 0.5%CVSS 9.9
critical.is priorityof 100
39
CVSS 9.9 (NVD)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 45.2.452 × 209.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
n8n< 1.123.43–CNA
n8n>= 2.0.0-rc.0, < 2.20.7–CNA
n8n>= 2.21.0, < 2.21.1–CNA

Scores by source

NVD9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
GitHub_M (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/n8n-io/n8n/security/advisories/GHSA-wrwr-h859-xh2r