CVE-2026-65591

n8n before 1.123.64 Sanitizer Bypass Remote Code Execution

State: Published
Severity: 8.9 High
Published: Jul 22, 2026
Updated: Oct 29, 2026
Reserved: Jul 22, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	8.9 High	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L	VulnCheck

Weaknesses

CWE-917 Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')

Affected Products

Product	Versions
n8nn8n-io	before 1.123.64Affected 1.123.64Not affected
n8nn8n-io	2.30.0 to before 2.30.1Affected 2.30.1Not affected
n8nn8n-io	2.0.0-rc.0 to before 2.29.8Affected 2.29.8Not affected

References

GitHub Security Advisory (GHSA-pm35-fqvh-cq5g)vendor-advisory
VulnCheck Advisory: n8n before 1.123.64 Sanitizer Bypass Remote Code Executionthird-party-advisory

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.