CVE-2026-42718 WordPress Booster for WooCommerce plugin <= 8.4.0 - PHP Object Injection vulnerability

Q: What is CVE-2026-42718?

CVE-2026-42718 is a critical unsafe deserialization vulnerability in Pluggabl Booster for WooCommerce, published on 10 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Q: Is CVE-2026-42718 being exploited?

There is no known exploitation of CVE-2026-42718 in the wild and no public exploit code.

Q: How do I fix CVE-2026-42718?

No fix has been published for CVE-2026-42718 yet. Limit exposure of the affected software until one is available.

Critical 9.8 Published 10 Oct 2026 Updated 11 Oct 2026

Unauthenticated attackers can exploit PHP object injection in the Booster for WooCommerce plugin to potentially execute arbitrary code.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-42718?

CVE-2026-42718 is a critical unsafe deserialization vulnerability in Pluggabl Booster for WooCommerce, published on 10 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Unauthenticated PHP Object Injection in Booster for WooCommerce <= 8.4.0 versions.

Weakness: CWE-502

Which versions are affected by CVE-2026-42718?

How do I fix CVE-2026-42718?

No fix has been published for CVE-2026-42718 yet. Limit exposure of the affected software until one is available.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2026-42718 being exploited?