CVE-2026-49108 park_of_ideas CVE debrief

Who should care

Administrators and users of the Moderno theme, versions less than 1.43, should be aware of this critical vulnerability and take necessary actions to secure their systems.

Technical summary

The CVE-2026-49108 vulnerability is caused by an unauthenticated PHP object injection in the Moderno theme, versions less than 1.43. This allows attackers to inject malicious PHP objects, potentially leading to arbitrary code execution. The vulnerability has a CVSS vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating a high impact on confidentiality, integrity, and availability.

Defensive priority

high

Recommended defensive actions

• Update the Moderno theme to version 1.43 or later.
• Restrict access to the affected systems and monitor for suspicious activity.
• Implement additional security measures, such as web application firewalls and intrusion detection systems.
• Regularly review and update software and themes to prevent similar vulnerabilities.
• Consider using a security audit tool to identify potential vulnerabilities.
• Isolate affected systems from critical networks and data.
• Monitor for and respond to potential exploitation attempts.

Evidence notes

The information provided is based on the CVE-2026-49108 record and a source item from the NVD. The CVE was published and last modified on June 17, 2026. The vulnerability is considered critical, with a CVSS score of 9.8.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.