CVE-2026-59193: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) in getgrav grav
A vulnerability in Grav prior to version 2.0.0 allows an authenticated admin.super user to cause a denial of service by uploading a specially crafted ZIP archive via the Direct Install tool. The issue arises because the unzipping process does not limit uncompressed size, entry count, or directory depth, leading to potential crashes or disk exhaustion. This vulnerability is fixed in version 2.0.0.
AI Analysis
Technical Summary
CVE-2026-59193 describes an improper handling of highly compressed data (CWE-409) in the Grav web platform before version 2.0.0. An authenticated admin.super user can exploit the Direct Install tool by uploading a malicious ZIP archive that triggers the Installer::unZip function to call ZipArchive::extractTo without restrictions on uncompressed size, number of entries, or directory depth. This can result in a denial of service by crashing the application or filling the disk. The vulnerability is resolved in Grav 2.0.0.
Potential Impact
An attacker with authenticated admin.super privileges can cause a denial of service condition by crashing the Grav platform or exhausting disk space through a crafted ZIP archive upload. This impacts availability but requires high privileges and no user interaction.
Mitigation Recommendations
This vulnerability is fixed in Grav version 2.0.0. Users should upgrade to version 2.0.0 or later to remediate this issue. No other official remediation or temporary fixes are documented. Patch status is confirmed by the vendor advisory stating the fix in 2.0.0.
CVE-2026-59193: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) in getgrav grav
Description
A vulnerability in Grav prior to version 2.0.0 allows an authenticated admin.super user to cause a denial of service by uploading a specially crafted ZIP archive via the Direct Install tool. The issue arises because the unzipping process does not limit uncompressed size, entry count, or directory depth, leading to potential crashes or disk exhaustion. This vulnerability is fixed in version 2.0.0.
CVSS v4.0
Score 6.9medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-59193 describes an improper handling of highly compressed data (CWE-409) in the Grav web platform before version 2.0.0. An authenticated admin.super user can exploit the Direct Install tool by uploading a malicious ZIP archive that triggers the Installer::unZip function to call ZipArchive::extractTo without restrictions on uncompressed size, number of entries, or directory depth. This can result in a denial of service by crashing the application or filling the disk. The vulnerability is resolved in Grav 2.0.0.
Potential Impact
An attacker with authenticated admin.super privileges can cause a denial of service condition by crashing the Grav platform or exhausting disk space through a crafted ZIP archive upload. This impacts availability but requires high privileges and no user interaction.
Mitigation Recommendations
This vulnerability is fixed in Grav version 2.0.0. Users should upgrade to version 2.0.0 or later to remediate this issue. No other official remediation or temporary fixes are documented. Patch status is confirmed by the vendor advisory stating the fix in 2.0.0.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-02T19:53:48.831Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a51295d68715ace43e3b87e
Added to database: 07/10/2026, 17:18:21 UTC
Last enriched: 07/10/2026, 17:32:42 UTC
Last updated: 07/10/2026, 18:06:56 UTC
Views: 4
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