Unauthenticated PHP Object Injection in Kalles

Executive Summary

CVE-2026-62076 is an unauthenticated PHP Object Injection vulnerability in the Kalles WordPress theme versions up to 1.1.7.1. This flaw allows attackers to inject malicious PHP objects into the application, potentially leading to remote code execution or other harmful server-side actions without requiring authentication.

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Detection Guidance

Detecting this vulnerability requires checking if the Kalles theme version 1.1.7.1 or earlier is installed. Inspect WordPress installations for the theme in the /wp-content/themes/ directory. Look for suspicious activity such as unexpected server requests or unusual data processing patterns.

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Impact Analysis

This vulnerability can allow attackers to take full control of your website, steal sensitive data, or use it as a launchpad for further attacks. Since it is unauthenticated, any unpatched website is at immediate risk of exploitation, potentially leading to complete compromise of the site and its data.

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Compliance Impact

This vulnerability could lead to unauthorized access and exposure of sensitive user data, violating GDPR and HIPAA compliance requirements. A breach may result in legal penalties, fines, and reputational damage due to failure to protect personal or health information.

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Mitigation Strategies

Immediately update the Kalles theme to the latest version if available. If no patch exists, apply Patchstack's temporary mitigation rule to block attacks. Consider disabling the theme temporarily or seeking help from your hosting provider or developer to implement safeguards.

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