CVE-2026-86197 — Grav before 2.0.20 Cross-Site Scripting via Assets Sandbox
Grav before 2.0.20 contains a cross-site scripting vulnerability in the Twig sandbox policy that allowlists addJs and addCss methods on Grav\Common\Assets without proper output …
Published: 2026-09-05 · CVSS: 5.1 · CVSS 4.0
Grav before 2.0.20 contains a cross-site scripting vulnerability in the Twig sandbox policy that allowlists addJs and addCss methods on Grav\Common\Assets without proper output escaping. Page editors can inject arbitrary script by registering malicious assets or injecting attributes, which are rendered unescaped into document head tags and executed for all visitors including administrators.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7