Sanitizer Bypass Vulnerability in n8n by n8n.io
CVE-2026-65591

8.9HIGH

Key Information:

Vendor

N8n-io

Status
N8n
Vendor
CVE Published:
22 July 2026

What is CVE-2026-65591?

The n8n platform is vulnerable due to a critical issue in its legacy expression evaluator, where the computed-member handler does not adequately sanitize user inputs. This flaw enables authenticated users with permissions to create or modify workflows to construct malevolent expressions, leading to potential host-level code execution. It is essential for users of affected versions to upgrade to 1.123.64, 2.29.8, or 2.30.1 to mitigate this risk.

Affected Version(s)

n8n 0 < 1.123.64

n8n 0 < 2.30.1

n8n 0 < 2.29.8

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-pm...
vendor-advisory
https://www.vulncheck.com/advisories/n8n-before-sanitizer...
third-party-advisory

CVSS V4

Score:
8.9
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Dremig
.