Vulnerability · Published Sep 3, 2026 · Assigned by VulnCheck
CVE-2026-85165n8n before 2.36.2 Expression Sandbox Bypass via SpreadElement
High 7.2
In plain English
A high-severity security flaw in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).
Severity (CVSS 4.0)7.2High
Exploit odds (30 days)0.6%top 52.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-95 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
References
- GitHub Security Advisory (GHSA-fg85-4wv2-p98j) vendor-advisory
- VulnCheck Advisory: n8n before 2.36.2 Expression Sandbox Bypass via SpreadElement third-party-advisory