What is CVE-2026-16258?

CVE-2026-16258 is a critical-severity vulnerability in Ajax Search Lite, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-08-07.

How severe is CVE-2026-16258?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Ajax Search Lite

CVE-2026-16258

The Ajax Search Lite WordPress plugin before 4.14.5 does not prevent the deserialization of untrusted input, allowing unauthenticated attackers to perform PHP Object Injection. When a suitable POP chain is present via another installed Aj…

Vulnerability class: Insecure Deserialization

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Unknown Ajax Search Lite — versions 0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-16258?: CVE-2026-16258 is a critical-severity vulnerability in Ajax Search Lite, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-08-07.
How severe is CVE-2026-16258?: Critical severity. CVSS v3 base score is 9.8 out of 10.