CVE-2026-13182 Progress Software CVE debrief

Who should care

Users of Progress Telerik UI for AJAX versions prior to v2026.2.708 should assess and apply the vendor's remediation for RadAsyncUpload client-state processing vulnerabilities. Operators, platform administrators, vulnerability management teams, and security teams should review the vulnerability details and plan for remediation or compensating controls as necessary.

Technical summary

CVE-2026-13182 is a HIGH-severity vulnerability in Progress Telerik UI for AJAX RadAsyncUpload. Client-state processing can distinguish decrypt failures from invalid-JSON parse failures, creating an oracle that reveals protected metadata values to remote attackers. The CVSS score is 7.5. Affected product deployments should be identified, and the vendor's remediation should be applied to mitigate potential impacts.

Defensive priority

Apply vendor remediation for RadAsyncUpload client-state processing vulnerabilities in Progress Telerik UI for AJAX versions prior to v2026.2.708. Inventory and assess Progress Telerik UI for AJAX usage, and monitor for potential exploitation attempts. Review compensating controls for exposed systems while remediation is scheduled and verified. Check relevant monitoring, detection, and logs for exposed assets that need extra review. Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Consider additional defensive measures based on the vulnerability's characteristics and potential impacts on your environment. Ensure that security teams and operators are aware of the vulnerability and its potential impacts on your systems and data. Implement monitoring and detection mechanisms to identify potential exploitation attempts. Develop incident response plans in case of successful exploitation. Conduct regular security audits and vulnerability assessments to identify and address potential vulnerabilities proactively. Collaborate with vendors and security experts to stay informed about the latest developments and best practices for mitigating similar vulnerabilities in the future. Consider implementing compensating controls, such as network segmentation or access controls, to limit the potential impact of a successful exploitation. Develop and implement a comprehensive vulnerability management program to identify, assess, and remediate vulnerabilities proactively. Ensure that security patches and updates are applied promptly, and that security policies and procedures are up-to-date and effective. Consider conducting regular penetration testing and red teaming exercises to identify and address potential weaknesses in your systems and defenses. Implement a continuous monitoring program to detect and respond to potential security incidents in real-time. Develop and maintain a comprehensive incident response

Recommended defensive actions

• Apply the vendor's remediation for CVE-2026-13182
• Inventory and assess Progress Telerik UI for AJAX usage
• Monitor for potential exploitation attempts

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation and verification are necessary to fully understand the impact and scope of CVE-2026-13182. The source details are restricted, and additional defensive verification tasks are required to confirm affected product deployments and assess potential exposure.

Official resources