CVE-2026-65556 WordPress WPBruiser {no- Captcha anti-Spam} plugin <= 3.1.43 - PHP Object Injection vulnerability
Unauthenticated attackers can exploit PHP object injection in the WPBruiser anti-spam 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-2026-65556?
CVE-2026-65556 is a critical unsafe deserialization vulnerability in MihChe WPBruiser {no- Captcha anti-Spam}, published on 6 Aug 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 WPBruiser {no- Captcha anti-Spam} <= 3.1.43 versions.
Weakness: CWE-502
Which versions are affected by CVE-2026-65556?
How do I fix CVE-2026-65556?
No fix has been published for CVE-2026-65556 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-2026-65556 being exploited?
There is no known exploitation of CVE-2026-65556 in the wild and no public exploit code.
Sources
Also known as GHSA-f7mx-xq66-8fmx.