n8n: Expression Sandbox Escape via Shared Builtin Tampering and Code-Printer Injection Leads to Code Execution
High-risk advisory
CVE-2026-86083
Summary
n8n: Expression Sandbox Escape via Shared Builtin Tampering and Code-Printer Injection Leads to Code Execution
Why it matters
GitHub has published a reviewed security advisory for n8n. Prioritize it with other application dependency updates, especially because EPSS places it in the 20% percentile.
Operator check
Check whether n8n is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 7.7. EPSS probability: 0.3%; percentile: 20%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.