CVE-2026-39859: Liquidjs

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

LiquidJS is a Shopify / GitHub Pages compatible template engine in pure JavaScript. Prior to 10.25.3, liquidjs 10.25.0 documents root as constraining filenames passed to renderFile() and parseFile(), but top-level file loads do not enforce that boundary. A Liquid instance configured with an empty temporary directory as root can return the contents of arbitrary files. This vulnerability is fixed in 10.25.3.

Affected products

• Liquidjs Liquidjs: before 10.25.3 (fixed in 10.25.3)

Published 2026-04-08. Last modified 2026-07-24.