| Component | n8n |
| Severity | critical (CVSS 9.9) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| Published (NVD) | 2026-09-03 |
| Last modified | 2026-09-10 |
| Affected versions | n8n < 2.35.4 n8n >= 2.36.0, <= 2.36.2 |
| Fixed in | 2.35.4 |
| Weakness | CWE-95 |
| CISA KEV | not listed |
NVD description
n8n versions before 2.36.2 contain an expression sandbox bypass vulnerability where free identifiers in spread, computed-key, switch-case, or class-extension positions resolve against process globals. Authenticated users with workflow-edit permission can mutate host objects through expression evaluation, with changes persisting process-wide until restart.
What to do
- Upgrade n8n to
2.35.4or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-85165
- https://github.com/n8n-io/n8n/security/advisories/GHSA-fg85-4wv2-p98j
- https://www.vulncheck.com/advisories/n8n-before-2.36.2-expression-sandbox-bypass-via-spreadelement
Read more
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