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.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.9
- CVSS 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
- EPSS probability
- 0.48%
- CWE
- CWE-917
- Published
- 2026-07-22
- Last modified
- 2026-07-24
Affected products
- n8n-io n8n
- n8n-io n8n
- n8n-io n8n
- n8n-io n8n
Weakness type
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