PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-13187 Progress Software CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-22T14:17:14.300Z and has not been modified since then. Progress Telerik UI for AJAX prior to v2026.2.708 is vulnerable to tampering with DialogHandler provider type input, potentially altering dialog processing and enabling chained exploitation. This HIGH severity vulnerability has a CVSS score of 8.1 and is classified under CWE-470. Administrators and users should apply the patch to prevent potential tampering.

Vendor
Progress Software
Product
Telerik UI for ASP.NET AJAX
CVSS
HIGH 8.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-22
Original CVE updated
2026-08-06
Advisory published
2026-07-22
Advisory updated
2026-08-06

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-13187 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-13187

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-13187 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-13187

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-dialoghandler-provider-type-tampering-CVE-2026-13187

    [email protected]

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.