Improper Handling of Highly Compressed Data (Data Amplification) Affecting getgrav/grav package, versions >=1.0.0, <2.0.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-GETGRAVGRAV-17950417
- published11 Jul 2026
- disclosed10 Jul 2026
- creditUnknown
Introduced: 10 Jul 2026
NewCVE-2026-59193 (opens in a new tab)How to fix?
Upgrade getgrav/grav to version 2.0.0 or higher.
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 exhaust disk space by uploading a specially crafted ZIP archive containing highly compressed data, as there are no restrictions on uncompressed size, entry count, or directory depth. This is only exploitable if the attacker has authenticated admin.super privileges.