Grav CMS — Improper Handling of Highly Compressed Data in Installer::unZip()

Summary An authenticated admin.super user can crash Grav or fill the disk by uploading a specially crafted ZIP archive through the Direct Install tool. The method Installer::unZip calls ZipArchive::extractTo without any limit on uncompressed size, entry count, or directory depth, enabling Zip Bom...

GHSA-2VCX-H8P2-9PG9 Grav CMS — Improper Handling of Highly Compressed Data in Installer::unZip()

Summary An authenticated admin.super user can crash Grav or fill the disk by uploading a specially crafted ZIP archive through the Direct Install tool. The method Installer::unZip calls ZipArchive::extractTo without any limit on uncompressed size, entry count, or directory depth, enabling Zip Bom...

Improper Handling of Highly Compressed Data (Data Amplification)

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data Data Amplification via the Installer::unZip process. An attacker can cause a system crash or exhau...

CVE-2026-59193

Grav is a file-based Web platform. Prior to 2.0.0, an authenticated admin.super user can crash Grav or fill the disk by uploading a specially crafted ZIP archive through the Direct Install tool because Installer::unZip calls ZipArchive::extractTo without limits on uncompressed size, entry count, ...