CVE-2026-65591

high

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.

References

Advisories
More

https://www.vulncheck.com/advisories/n8n-before-sanitizer-bypass-remote-code-execution

https://github.com/n8n-io/n8n/security/advisories/GHSA-pm35-fqvh-cq5g

https://github.com/IamDremig/CVE-2026-65591

Details

Source: Mitre, NVD

Published: 2026-07-22

Updated: 2026-07-27

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

CVSS v4

Base 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

Severity: High

EPSS

EPSS: 0.00534