What is CVE-2026-110039?

CVE-2026-110039 is a low-severity vulnerability in Smush, classified under Incorrect Authorization. CVSS score: 2.7/10. Published 2026-10-16.

How severe is CVE-2026-110039?

Low severity. CVSS v3 base score is 2.7 out of 10.

Auth bypass in Smush

CVE-2026-110039

The Smush WordPress plugin before 4.3.4 does not restrict changes to a network-wide access setting to network administrators, allowing an administrator of a single site on a multisite network to change it for the entire network.

Vulnerability class: Broken Access Control

Published 2026-10-16 · last modified 2026-10-16.

CVSS v3 metric

CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Smush

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

wpscan.com/vulnerability/4f27b2fd-1b27-4274-85c5-f19e6998aa44/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-110039?: CVE-2026-110039 is a low-severity vulnerability in Smush, classified under Incorrect Authorization. CVSS score: 2.7/10. Published 2026-10-16.
How severe is CVE-2026-110039?: Low severity. CVSS v3 base score is 2.7 out of 10.