CVE-2026-65591
8.9
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
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| n8n-io | n8n | 0 < 1.123.64 | affected |
| n8n-io | n8n | 1.123.64 | unaffected |
| n8n-io | n8n | 0 < 2.30.1 | affected |
| n8n-io | n8n | 2.30.1 | unaffected |
| n8n-io | n8n | 0 < 2.29.8 | affected |
| n8n-io | n8n | 2.29.8 | unaffected |
Weaknesses
- CWE-917: Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-pm35-fqvh-cq5g
- https://www.vulncheck.com/advisories/n8n-before-sanitizer-bypass-remote-code-execution
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