CVE-2026-65591

n8n before 1.123.64 Sanitizer Bypass Remote Code Execution

Published Jul 22, 2026 CVSS 4.0 · 8.9 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-pm35-fqvh-cq5g n8n: Legacy Expression Evaluator Sanitizer Bypass Leads to Authenticated Code Execution
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title n8n before 1.123.64 Sanitizer Bypass Remote Code Execution
First Time appeared N8n
N8n n8n
Weaknesses CWE-917
CPEs cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*
Vendors & Products N8n
N8n n8n
References
Metrics cvssV4_0

{'score': 8.9, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 29, 2026, 9:16 PM
Reserved
Jul 22, 2026, 10:45 AM
Status
Analyzed
Published
Jul 22, 2026, 12:18 PM
Modified
Oct 29, 2026, 7:17 PM