by Kastro
Paper/Archive/CVE-2026-85165

CVE-2026-85165

n8n-io n8n — n8n before 2.36.2 Expression Sandbox Bypass via SpreadElement

EPSS 0.6%CVSS 9.9
critical.is priorityof 100
39
CVSS 9.9 (NVD)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 47.2.472 × 209.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
n8n2.36.0 – < 2.36.22.36.2CNA
n8n< 2.35.42.35.4CNA

Scores by source

NVD9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
VulnCheck (CNA)7.2CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

advisorygithub.com/n8n-io/n8n/security/advisories/GHSA-fg85-4wv2-p98jwriteupvulncheck.com/advisories/n8n-before-2.36.2-expression-sandbox-bypass-via-spreadelement