CVE-2026-110039 Smush < 4.3.4 - Admin+ Network-Wide Plugin Settings Update on Multisite
A site administrator can modify network-wide plugin settings in a WordPress multisite environment without proper authorization.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-110039?
CVE-2026-110039 is a low-severity missing authorization vulnerability in Unknown Smush, published on 16 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-863
Which versions are affected by CVE-2026-110039?
How do I fix CVE-2026-110039?
No fix has been published for CVE-2026-110039 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-110039 being exploited?
There is no known exploitation of CVE-2026-110039 in the wild and no public exploit code.
Sources
Also known as GHSA-w7j2-h466-h8g2.