CVE-2026-13188
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Dialog Parameter Tampering in Progress Telerik UI for AJAX

Publication date: 2026-07-22

Last updated on: 2026-07-22

Assigner: Progress Software Corporation

Description
In Progress® Telerik® UI for AJAX prior to v2026.2.708, DialogHandler request parameters may be tampered with, potentially altering dialog server-side behavior and enabling chained exploitation.

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Meta Information

Published
2026-07-22
Last Modified
2026-07-22
Generated
2026-07-22
AI Q&A
2026-07-22
EPSS Evaluated
N/A
NVD
CVE-2026-13188
EUVD
EUVD-2026-47693

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
progress telerik_ui_for_ajax to 2026.2.708 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-345 The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

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Executive Summary

This vulnerability affects Progress Telerik UI for AJAX versions before v2026.2.708. It involves tampering with DialogHandler request parameters, which could alter server-side dialog behavior and enable further exploitation.

Detection Guidance

Monitor network traffic for unusual DialogHandler requests with tampered parameters. Check server logs for unexpected dialog behavior changes or server-side errors related to DialogHandler processing.

Impact Analysis

An attacker could manipulate DialogHandler parameters to change how dialogs behave on the server side, potentially leading to unauthorized actions or data exposure. The impact is rated as high for integrity (I:H) but low for confidentiality and availability.

Compliance Impact

This vulnerability may impact compliance with GDPR and HIPAA by enabling unauthorized server-side behavior changes through tampered DialogHandler parameters. Unauthorized modifications could lead to data integrity issues or unintended access, which are critical concerns under these regulations.

Mitigation Strategies

Update Progress Telerik UI for AJAX to version 2026.2.708 or later immediately. If immediate update is not possible, restrict access to DialogHandler endpoints and validate all incoming DialogHandler request parameters server-side.

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