CVE-2026-59193
MEDIUMGrav CMS — Improper Handling of Highly Compressed Data in Installer::unZip()
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/getgrav/grav/security/advisories/GHSA-2vcx-h8p2-9pg9
X_Refsource_Misc x_refsource_misc
https://github.com/getgrav/grav/commit/23d6f2adf4ce11889c088ac8557c8314baeef781
X_Refsource_Misc x_refsource_misc
https://github.com/getgrav/grav/releases/tag/2.0.0
Scores
CVSS v3
4.9
EPSS
0.0039
EPSS Percentile
31.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-409
Status
published
Products (3)
getgrav/grav
2.0.0 beta1
getgrav/grav
1.0.0 - 2.0.0
getgrav/grav
>= 1.0.0, < 2.0.0
Published
Jul 10, 2026
Tracked Since
Jul 10, 2026