Is CVE-2026-1426 actively exploited?

No active exploitation of CVE-2026-1426 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-1426 be exploited remotely?

Yes. CVE-2026-1426 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-1426?

CVE-2026-1426 has a CVSS score of 8.8 (HIGH) and an EPSS exploitation probability of 0.10%.

HOME VULNERABILITIESCVE-2026-1426

HIGH

CVE-2026-1426

CWE-502Published: February 18, 2026· Updated: Feb 18, 2026

8.8

CVSS v3.1

EPSS:0.09%probability of exploitation in 30 daysPercentile:25.4th

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.

NVD Source

Technical Analysis

CVE-2026-1426 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.