CVE-2026-109398: Improper Handling of Highly Compressed Data (Data Amplification) in gumlet php-image-resize
Description
A denial of service vulnerability exists in gumlet php-image-resize before version 3.0.1. The vulnerability arises because the ImageResize constructor passes images to GD imagecreatefrom* functions without enforcing pixel limits. This allows remote attackers to upload small, highly compressed images that decompress into large bitmaps, exhausting PHP memory and terminating the worker process.
CVSS v4.0
Score 8.7high
Affected software
gumlet
php-image-resize
pkg:github/php-image-resizeRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-109398 affects gumlet php-image-resize versions prior to 3.0.1. The ImageResize constructor in lib/ImageResize.php does not impose pixel limits when passing images to GD's imagecreatefrom* functions. This improper handling of highly compressed images enables remote attackers to cause a denial of service by uploading small images that expand into large bitmaps, consuming excessive PHP memory and terminating the worker process.
Potential Impact
Successful exploitation results in denial of service by exhausting PHP memory resources, causing the termination of the worker process handling the image. This disrupts service availability but does not indicate code execution or data compromise.
Mitigation Recommendations
A fix is available in version 3.0.1 of gumlet php-image-resize. Users should upgrade to version 3.0.1 or later to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-12T14:40:48.402Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6accfdf32cdf04f656a8855a
Added to database: 10/12/2026, 15:34:11 UTC
Last enriched: 10/12/2026, 15:48:24 UTC
Last updated: 10/12/2026, 15:49:04 UTC
Views: 4
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