CVE-2026-78292 WordPress Hash Form plugin <= 1.4.1 - PHP Object Injection vulnerability
Unauthenticated attackers can exploit PHP object injection in the Hash Form 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-2026-78292?
CVE-2026-78292 is a critical unsafe deserialization vulnerability in hashthemes Hash Form, published on 27 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 Hash Form <= 1.4.1 versions.
Weakness: CWE-502
Which versions are affected by CVE-2026-78292?
How do I fix CVE-2026-78292?
No fix has been published for CVE-2026-78292 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-2026-78292 being exploited?
There is no known exploitation of CVE-2026-78292 in the wild and no public exploit code.
Sources
Also known as GHSA-j565-hhqc-8rx3.