CVE-2026-109398

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.54% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 45.2% of scored records. A rank, not a probability.

NVD base score

8.7 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-10-16.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-10-12 15:16Z16 DAYS AGO

Last updated

2026-10-13 18:20Z15 DAYS AGO

Reserved

2026-10-12

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS 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

Weaknesses

• CWE-409Improper Handling of Highly Compressed Data (Data Amplification)Base

Data version

5.2

Document digest

31ca984e205cb738ea9fecea0c96b12e2af9c7d16e2e7003390c60143dcee25d

• github.comGitHub Security Advisory (GHSA-3g9v-hjrx-mg5h)https://github.com/gumlet/php-image-resize/security/advisories/GHSA-3g9v-hjrx-mg5hvendor-advisory
• github.comhttps://github.com/gumlet/php-image-resize/commit/10c1f386e672536d82be0f39b236a80d87767a50patch
• github.comhttps://github.com/gumlet/php-image-resize/commit/cd01c9e8aa2382211d760c825799c8102987a8c2patch
• github.comhttps://github.com/gumlet/php-image-resize/blob/3.0.0/lib/ImageResize.php#L122-L163technical-description
• github.comphp-image-resize 3.0.1 Release Noteshttps://github.com/gumlet/php-image-resize/releases/tag/3.0.1release-notes
• www.vulncheck.comVulnCheck Advisory: Gumlet php-image-resize before 3.0.1 Denial of Service via Decompression Bombshttps://www.vulncheck.com/advisories/gumlet-php-image-resize-before-3.0.1-denial-of-service-via-decompression-bombsthird-party-advisory