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CVE-2026-109398

7.5 · HIGH

Gumlet php-image-resize before 3.0.1 contains a denial of service vulnerability because the ImageResize constructor in lib/ImageResize.php passes images to GD imagecreatefrom* functions without pix…

Published Oct 12, 2026CWE-409EPSS 0.54%

Overview

CVE-2026-109398 is a high-severity vulnerability. It was published on October 12, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Gumlet php-image-resize before 3.0.1 contains a denial of service vulnerability because the ImageResize constructor in lib/ImageResize.php passes images to GD imagecreatefrom* functions without pixel limits. Remote attackers can upload small, highly compressed images that decode to large bitmaps, exhausting PHP memory and terminating the worker process.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/gumlet/php-image-resize/blob/3.0.0/lib/ImageResize.php#L122-L163GitHubgithub.com/gumlet/php-image-resize/commit/10c1f386e672536d82be0f39b236a80d87767a50GitHubgithub.com/gumlet/php-image-resize/commit/cd01c9e8aa2382211d760c825799c8102987a8c2GitHubgithub.com/gumlet/php-image-resize/releases/tag/3.0.1GitHubgithub.com/gumlet/php-image-resize/security/advisories/GHSA-3g9v-hjrx-mg5hRefwww.vulncheck.com/advisories/gumlet-php-image-resize-before-3.0.1-denial-of-service-via-decompression-bombsGitHubgithub.com/gumlet/php-image-resize/security/advisories/GHSA-3g9v-hjrx-mg5h

How CyberStrike helps

Frequently asked questions

What is CVE-2026-109398?

CVE-2026-109398 is a high-severity vulnerability. It was published on October 12, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-109398?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-109398?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-109398?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-109398 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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