CVE-2026-86197
UNKNOWN
NVD
CVSS Score
0
Severity
UNKNOWN
Published
Sep 05, 2026
Vendor
unknown
Description
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.