CVE-2026-86197

UNKNOWN 0.0

Grav before 2.0.20 Cross-Site Scripting via Assets Sandbox

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	getgrav
Product	grav
Published	Sep 5, 2026
Last Updated	Sep 10, 2026

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Affected Versions

getgrav / grav

0 < 2.0.20

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/getgrav/grav/security/advisories/GHSA-8hgv-xc77-jmcr vulncheck.com: https://www.vulncheck.com/advisories/grav-before-2.0.20-cross-site-scripting-via-assets-sandbox

Credits

🔍 skeletonsec