Medium severity · published Jul 10, 2026
CVE-2026-59193
Grav CMS — Improper Handling of Highly Compressed Data in Installer::unZip()
4.9
CVSS
0.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
grav · getgrav
>= 1.0.0, < 2.0.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59193
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59193
Patch
https://github.com/getgrav/grav/commit/23d6f2adf4ce11889c088ac8557c8314baeef781
Product
https://github.com/getgrav/grav/releases/tag/2.0.0
Exploit
https://github.com/getgrav/grav/security/advisories/GHSA-2vcx-h8p2-9pg9
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