CVSS 9.9 (critical) · published 2026-09-03
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.
Affected products (NVD): n8n n8n
Fixed in (NVD): 2.35.4
Weakness: CWE-95
Source: NVD CVE-2026-85165
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