CVE-2026-86197

published 2026-09-05

CVE-2026-86197: 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…

Priority P4 27 medium 5.1 CVSS 4.0

AV N AC L AT N PR L UI P VC L VI L VA N SC L SI L SA N E X CR X IR X AR X MAV X MAC X MAT X MPR X MUI X MVC X MVI X MVA X MSC X MSI X MSA X S X AU X R X V X RE X U X

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.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
getgrav	grav	< 2.0.20	2.0.20

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CWE-79