CVE-2026-28074

Comprehensive Technical Analysis of CVE-2026-28074

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2026-28074 CISA Vulnerability Name: CVE-2026-28074 Description: Deserialization of Untrusted Data vulnerability in ThemeREX Pizza House pizzahouse allows Object Injection. This issue affects Pizza House versions from n/a through <= 1.4.0. CVSS Score: 9.8

The CVSS score of 9.8 indicates a critical vulnerability. This high score is due to the potential for severe impact, including unauthorized access, data breaches, and system compromise. The vulnerability involves deserialization of untrusted data, which can lead to object injection attacks. This type of vulnerability is particularly dangerous because it can allow attackers to execute arbitrary code on the affected system.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Untrusted Data Input: Attackers can exploit this vulnerability by sending specially crafted serialized data to the application.
• Web Requests: The vulnerability can be triggered through HTTP requests, making it accessible over the network.

Exploitation Methods:

• Object Injection: By deserializing untrusted data, attackers can inject malicious objects into the application.
• Remote Code Execution (RCE): If the injected objects contain executable code, attackers can achieve RCE, leading to full system compromise.
• Data Exfiltration: Attackers can use this vulnerability to extract sensitive information from the application.

3. Affected Systems and Software Versions

Affected Software:

• ThemeREX Pizza House pizzahouse versions from n/a through <= 1.4.0.

Affected Systems:

• Any system running WordPress with the affected versions of the ThemeREX Pizza House theme.
• Servers hosting WordPress sites using the vulnerable theme.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update/Patch: Immediately update to a patched version of the ThemeREX Pizza House theme if available.
• Disable Deserialization: If an update is not available, consider disabling deserialization of untrusted data.
• Input Validation: Implement strict input validation to ensure that only trusted data is deserialized.

Long-Term Strategies:

• Regular Updates: Ensure that all WordPress themes and plugins are regularly updated.
• Security Audits: Conduct regular security audits and vulnerability assessments.
• Web Application Firewalls (WAF): Deploy WAFs to detect and block malicious requests.
• Monitoring: Implement continuous monitoring to detect any suspicious activities.

5. Impact on Cybersecurity Landscape

The discovery of this vulnerability highlights the ongoing risks associated with deserialization of untrusted data, a common issue in web applications. It underscores the importance of secure coding practices and regular security audits. The high CVSS score indicates the potential for significant damage, including data breaches and system compromises, which can have far-reaching implications for organizations relying on the affected software.

6. Technical Details for Security Professionals

Vulnerability Details:

• Deserialization Process: The vulnerability occurs during the deserialization process, where untrusted data is converted back into an object.
• Object Injection: Attackers can craft serialized data that, when deserialized, creates objects with malicious properties or methods.
• Exploitation: The injected objects can be used to execute arbitrary code, manipulate application logic, or exfiltrate data.

Detection and Response:

• Log Analysis: Monitor logs for unusual deserialization activities or errors.
• Intrusion Detection Systems (IDS): Use IDS to detect and alert on suspicious deserialization attempts.
• Incident Response: Have an incident response plan in place to quickly address any detected exploitation attempts.

Code Review:

• Secure Coding Practices: Ensure that deserialization is only performed on trusted data.
• Serialization Libraries: Use secure serialization libraries that provide mechanisms to validate and sanitize input data.

Conclusion: CVE-2026-28074 represents a critical vulnerability that requires immediate attention. Organizations using the affected ThemeREX Pizza House theme should prioritize updating to a patched version and implement additional security measures to mitigate the risk of exploitation. Regular security audits and adherence to secure coding practices are essential to prevent similar vulnerabilities in the future.

References:

• PatchStack Vulnerability Report