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Vulnerabilities

Vulnerability · CVE-2026-28139

Deserialization of Untrusted Data

Published Aug 4, 2026 · catalog updated Aug 4, 2026 · Ajax Search Lite

Patch now

CVE-2026-28139 is in the CISA known-exploited catalog. Confirm Ajax Search Lite against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
0.56%
Remediation
Remediation guidance
Affected products
stated Ajax Search Lite · vendor wpdreams Ajax Search Lite

Unauthenticated PHP Object Injection in Ajax Search Lite <= 4.14.4 versions.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated Ajax Search Lite<= 4.14.4
  • vendor wpdreams Ajax Search Liteversion unspecified

How to fix CVE-2026-28139

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-28139 is in the CISA known-exploited catalog. Confirm Ajax Search Lite against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with Ajax Search Lite <= 4.14.4. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 0.56%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 4, 2026 · VulnCheck KEV

    Detected

    Unauthenticated PHP Object Injection in Ajax Search Lite <= 4.14.4 versions.

  2. Aug 4, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2026-28139

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-28139

    30-day exploitation probability 0.6%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2026-28139

    Unauthenticated PHP Object Injection in Ajax Search Lite <= 4.14.4 versions.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.