---
id: "CVE-2026-110039"
kind: "vulnerability"
aliases: ["CVE-2026-110039"]
title: "Smush WordPress plugin: site admins can change network-wide settings on multisite"
severity: "low"
cvss: 2.7
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["multisite", "package", "smush", "wordpress"]
not_affected_if: ["plugin-not-installed", "plugin-version-4.3.4-or-later", "single-site"]
published_at: "2026-10-16T07:17:10+00:00"
first_seen_at: "2026-10-23T21:57:12+00:00"
updated_at: "2026-10-25T04:48:08+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-110039", "first_seen_at": "2026-10-23T21:57:12+00:00"}]
---

# Smush WordPress plugin: site admins can change network-wide settings on multisite

Before version 4.3.4, the Smush WordPress plugin lets an administrator of a single site on a multisite network change a network-wide access setting that should only be changed by network administrators. The change then applies to the entire network.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Smush version in the WordPress plugins screen or with `wp plugin get wp-smushit --field=version`
- Check whether the install is a multisite network with `wp core is-installed --network`

## Fix

- Update the Smush plugin to `4.3.4` or later

## Timeline

- 2026-10-23T21:57:12+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-110039

## From the sources

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.

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