CVE-2026-1426 Advanced AJAX Product Filters <= 3.1.9.6 - Authenticated (Author+) PHP Object Injection via Live Composer Compatibility
Authenticated attackers can inject PHP objects via deserialization in the Live Composer compatibility layer, potentially leading to code execution or data exposure if a POP chain exists.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1426?
CVE-2026-1426 is a high-severity unsafe deserialization vulnerability in berocket Advanced AJAX Product Filters, published on 18 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Advanced AJAX Product Filters plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.1.9.6 via deserialization of untrusted input in the shortcode_check function within the Live Composer compatibility layer. This makes it possible for authenticated attackers, with Author-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present. Note: This vulnerability requires the Live Composer plugin to also be installed and active.
Weakness: CWE-502
Which versions are affected by CVE-2026-1426?
How do I fix CVE-2026-1426?
No fix has been published for CVE-2026-1426 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-2026-1426 being exploited?
There is no known exploitation of CVE-2026-1426 in the wild and no public exploit code.
Sources
Also known as GHSA-qq7g-427f-cm2r.