CVE-2026-40759: CWE-502 Deserialization of Untrusted Data in Mikado-Themes Esmée
CVE-2026-40759 is a high-severity vulnerability in Mikado-Themes Esmée versions up to and including 1.4. It involves unauthenticated PHP object injection due to deserialization of untrusted data, classified under CWE-502. This vulnerability allows an attacker to potentially execute arbitrary code or cause denial of service without requiring authentication. No official patch or remediation guidance is currently available from the vendor.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-40759) affects Mikado-Themes Esmée versions <= 1.4 and is caused by unsafe deserialization of untrusted data leading to unauthenticated PHP object injection. The CVSS 3.1 score is 8.1 (high), reflecting network attack vector, high complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. No vendor advisory or patch information is provided, and no known exploits are reported in the wild as of the published date.
Potential Impact
Successful exploitation can lead to full compromise of the affected system, including arbitrary code execution, data disclosure, and denial of service. The vulnerability is exploitable remotely without authentication, increasing the risk to exposed installations of Esmée <= 1.4.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider restricting access to the affected application and monitoring for suspicious activity related to deserialization attempts.
CVE-2026-40759: CWE-502 Deserialization of Untrusted Data in Mikado-Themes Esmée
Description
CVE-2026-40759 is a high-severity vulnerability in Mikado-Themes Esmée versions up to and including 1.4. It involves unauthenticated PHP object injection due to deserialization of untrusted data, classified under CWE-502. This vulnerability allows an attacker to potentially execute arbitrary code or cause denial of service without requiring authentication. No official patch or remediation guidance is currently available from the vendor.
CVSS v3.1
Score 8.1high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-40759) affects Mikado-Themes Esmée versions <= 1.4 and is caused by unsafe deserialization of untrusted data leading to unauthenticated PHP object injection. The CVSS 3.1 score is 8.1 (high), reflecting network attack vector, high complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. No vendor advisory or patch information is provided, and no known exploits are reported in the wild as of the published date.
Potential Impact
Successful exploitation can lead to full compromise of the affected system, including arbitrary code execution, data disclosure, and denial of service. The vulnerability is exploitable remotely without authentication, increasing the risk to exposed installations of Esmée <= 1.4.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider restricting access to the affected application and monitoring for suspicious activity related to deserialization attempts.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Patchstack
- Date Reserved
- 2026-04-15T09:20:25.914Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a31c7a50b89be6888375e31
Added to database: 6/16/2026, 10:01:09 PM
Last enriched: 6/16/2026, 10:16:03 PM
Last updated: 6/17/2026, 5:02:49 AM
Views: 4
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