CVE-2026-65591

n8n contains a sanitizer bypass vulnerability in the legacy expression evaluator's computed-member handler. An authenticated user with workflow create or modify permissions can craft a malicious expression to bypass the sanitizer and achieve host-level code execution as the n8n process. The legacy expression engine is the default in affected versions. Fixed in n8n 1.123.64, 2.29.8, and 2.30.1.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/n8n-io/n8n/security/advisories/GHSA-pm35-fqvh-cq5g	Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/n8n-before-sanitizer-bypass-remote-code-execution	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:n8n:n8n:::::community:node.js::
	cpe:2.3:a:n8n:n8n:::::enterprise:node.js::
	cpe:2.3:a:n8n:n8n:::::community:node.js::
	cpe:2.3:a:n8n:n8n:::::enterprise:node.js::
	cpe:2.3:a:n8n:n8n:2.30.0::::community:node.js::*
	cpe:2.3:a:n8n:n8n:2.30.0::::enterprise:node.js::*

History

24 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) n8n contiene una vulnerabilidad de omisión de saneador en el gestor de miembros computados del evaluador de expresiones heredado. Un usuario autenticado con permisos para crear o modificar flujos de trabajo puede crear una expresión maliciosa para omitir el saneador y lograr la ejecución de código a nivel de host como el proceso de n8n. El motor de expresiones heredado es el predeterminado en las versiones afectadas. Corregido en n8n 1.123.64, 2.29.8 y 2.30.1.

Information

Published : 2026-07-22 12:18

Updated : 2026-10-29 19:17

NVD link : CVE-2026-65591

Mitre link : CVE-2026-65591

CVE.ORG link : CVE-2026-65591

JSON object : View

Products Affected

n8n

n8n

CWE

CWE-917

Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')

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