CVE-2026-105436: Deserialization of Untrusted Data in MainWP MainWP Child
Description
CVE-2026-105436 is a high severity vulnerability in MainWP Child plugin versions prior to 6.2.2. It involves deserialization of untrusted data, leading to object injection. This flaw can result in complete compromise of confidentiality, integrity, and availability of the affected system. The vulnerability requires no privileges but user interaction is needed to exploit. No known exploits are reported in the wild. A fix is implied to exist in version 6.2.2 or later.
CVSS v3.1
Score 8.8high
Affected software
MainWP
MainWP Child
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-105436 affects MainWP Child plugin versions from initial releases up to 6.2.1. It is caused by unsafe deserialization of untrusted data, allowing an attacker to perform object injection. This can lead to remote code execution or other severe impacts. The CVSS 3.1 base score is 8.8, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation of this vulnerability can lead to full compromise of the affected system, including unauthorized disclosure, modification, or destruction of data and potential remote code execution. The attack can be performed remotely without privileges but requires user interaction.
Mitigation Recommendations
Users should upgrade MainWP Child plugin to version 6.2.2 or later where this vulnerability is fixed. No additional mitigation guidance is provided. Patch status is inferred from the affected versions range indicating the fix is in 6.2.2.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Patchstack
- Date Reserved
- 2026-10-05T13:00:43.469Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac7d1292cdf04f6562ba9ab
Added to database: 10/08/2026, 17:21:45 UTC
Last enriched: 10/08/2026, 17:33:31 UTC
Last updated: 10/09/2026, 05:48:07 UTC
Views: 7
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