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 cra

highCVSS 8.8CVE-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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 8.8
Published: 2026-07-22
Last updated: 2026-07-27
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-65591

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-655910.47% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-65591	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

highGHSA-pm35-fqvh-cq5g: n8n: Legacy Expression Evaluator Sanitizer Bypass Leads to Authenticated Code Executionghsa

Recent advisories for n8n contains a

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-65599: n8n versions before 1.123.64, 2.29.8, and 2.30.1 contain a credential exposure vulnerability: …nvd · 2026-07-22
highCVE-2026-65598: n8n before 1.123.64, 2.29.8, and 2.30.1 contains a TOCTOU race condition in the Git node's clo…nvd · 2026-07-22
mediumCVE-2026-65597: n8n before 1.123.64, 2.x before 2.29.8, and before 2.30.1 contains a DOM-based cross-site scri…nvd · 2026-07-22
mediumCVE-2026-65593: n8n versions before 1.123.64, 2.29.8, and 2.30.1 contain a server-side request forgery vulnera…nvd · 2026-07-22
mediumCVE-2026-65592: n8n before 1.123.64, 2.29.8, and 2.30.1 contains a stored DOM cross-site scripting vulnerabili…nvd · 2026-07-22
highCVE-2026-65016: n8n versions before 1.123.64, 2.29.8, and 2.30.1 contain a privilege escalation vulnerability …nvd · 2026-07-22