RCE in N8n
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.
Vulnerability class: Log4Shell (CVE-2021-44228)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- N8n — versions 2.30.0
- N8n-Io N8n — versions 0, 1.123.64, 2.30.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/n8n-io/n8n/security/advisories/GHSA-pm35-fqvh-cq5g (vendor-advisory, Mitigation, Vendor Advisory)
- www.vulncheck.com/advisories/n8n-before-sanitizer-bypass-remote-code-execution (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-65591?
- CVE-2026-65591 is a high-severity vulnerability in N8n, classified under Improper Neutralization of Special Elements used in an Expression Language Statement (Expression Language Injection). CVSS score: 8.8/10. Published 2026-07-22.
- How severe is CVE-2026-65591?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2026-65591 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.