Deserialization in Shortpixel Image Optimizer

CVE-2026-39471

Author PHP Object Injection in ShortPixel Image Optimizer <= 6.4.3 versions.

Vulnerability class: Insecure Deserialization

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (43.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-39471: held from 0.004 to 0.005.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-39471?
CVE-2026-39471 is a high-severity vulnerability in Shortpixel Image Optimizer, classified under Deserialization of Untrusted Data. CVSS score: 7.2/10. Published 2026-06-15.
How severe is CVE-2026-39471?
High severity. CVSS v3 base score is 7.2 out of 10.