CVE-2026-59193CWE-409

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

Medium · published July 10, 2026

CVSS v4.0
6.9
EPSS
1%
Percentile
48.0
In the wild
Unconfirmed
What it is

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, or directory depth. This issue is fixed in version 2.0.0.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00600 · 48.0th percentile
Weakness
CWE-409 · Improper Handling of Highly Compressed Data (Data Amplification)
Published
2026-07-10T16:35Z
EPSS history
Timeline
  • 10 JUL 16:35Z
    Grav CMS — Improper Handling of Highly Compressed Data in Installer::unZip()
    cvelistv5