CVE-2026-13187 Progress Software CVE debrief

Who should care

Administrators and users of Progress Telerik UI for AJAX versions prior to v2026.2.708 should apply the patch to prevent potential tampering with DialogHandler provider type input. Operators, platform administrators, vulnerability management teams, and security teams should review the vulnerability and apply necessary mitigations.

Technical summary

CVE-2026-13187 is a HIGH severity vulnerability in Progress Telerik UI for AJAX prior to v2026.2.708. The DialogHandler provider type input may be tampered with, potentially altering dialog processing and enabling chained exploitation. The vulnerability has a CVSS score of 8.1 and is classified under CWE-470. Affected product deployments should be reviewed for exposure.

Defensive priority

High priority should be given to patching Progress Telerik UI for AJAX versions prior to v2026.2.708 to prevent potential exploitation.

Recommended defensive actions

• Apply the patch to Progress Telerik UI for AJAX versions prior to v2026.2.708
• Review and update Progress Telerik UI for AJAX configurations to ensure DialogHandler provider type input is properly validated
• Monitor Progress Telerik UI for AJAX systems 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

Evidence notes

The CVE record was published on 2026-07-22T14:17:14.300Z and has not been modified since then. The NVD entry is currently Undergoing Analysis. Limited information is available about the vulnerability, and further analysis is required to fully understand the impact. Defenders should verify the affected scope, severity, and vendor guidance.

Official resources