CVE-2026-19223 Smush < 4.3.2 - Admin+ Network-Wide RCE via Hub Connector on Multisite
A site administrator on a WordPress multisite network can execute arbitrary code across the entire network due to insufficient permission checks in the Smush plugin.
- 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-2026-19223?
CVE-2026-19223 is a high-severity code injection vulnerability in Unknown Smush, published on 27 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Smush WordPress plugin before 4.3.2 does not restrict a network-wide setting to network administrators, allowing an administrator of any single site on a multisite network to execute arbitrary code across the entire network.
Weakness: CWE-94
Which versions are affected by CVE-2026-19223?
How do I fix CVE-2026-19223?
No fix has been published for CVE-2026-19223 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-19223 being exploited?
There is no known exploitation of CVE-2026-19223 in the wild and no public exploit code.
Sources
Also known as GHSA-fwv9-6885-g85c.