CVE-2026-85165

Critical

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.

SeverityCritical

CVSS9.9

Exploit probability—

Product

N8n

PublishedSep 3, 2026

First seenSep 3, 2026

Weakness typeCWE-95CWE-95

How to fix

Update

n8n n8n2.35.4 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-fg85-4wv2-p98j

Affected products

Product	Affected versions	Fixed in
n8n n8n	v < 2.35.4, 2.36.0 ≤ v ≤ 2.36.2	2.35.4

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