CVE-2026-44791

n8n: XML Node Prototype Pollution Patch Bypass

State: Published
Severity: 9.4 Critical
Published: Jun 23, 2026
Updated: Jun 23, 2026
Reserved: May 7, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	9.4 Critical	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	GitHub_M

Weaknesses

CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Affected Products

Product	Versions
n8nn8n-io	< 1.123.43Affected >= 2.0.0-rc.0, < 2.20.7Affected >= 2.21.0, < 2.21.1Affected

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-wrwr-h859-xh2r

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