CVE-2026-13186
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Path Traversal 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, a path traversal vulnerability in the file-based persistence storage provider can be exploited when the storage key is derived from user-controlled input, enabling attacker-controlled deserialization and remote code execution.

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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-2026-13186
EUVD
EUVD-2026-47691

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-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

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Executive Summary

This is a path traversal vulnerability in Progress Telerik UI for AJAX before version 2026.2.708. It allows attackers to manipulate file paths in the storage key, leading to deserialization of attacker-controlled data and remote code execution.

Detection Guidance

To detect this vulnerability, check if your system is running Progress Telerik UI for AJAX versions prior to 2026.2.708. Inspect file-based persistence storage providers for path traversal patterns in user-controlled input. Monitor for unexpected deserialization or remote code execution attempts in logs.

Impact Analysis

An attacker could exploit this to execute arbitrary code on your server, potentially gaining full control. This could lead to data theft, system compromise, or further network infiltration if the vulnerable application is exposed to untrusted networks.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection requirements and HIPAA's security rules. Organizations may face fines or penalties for failing to protect sensitive data due to this flaw.

Mitigation Strategies
  • Upgrade Progress Telerik UI for AJAX to version 2026.2.708 or later to address the path traversal and deserialization vulnerability.
  • Review and restrict access to the AppDataStorageProvider configuration to prevent unauthorized input manipulation.
  • Monitor network traffic for unusual deserialization requests or file access patterns that may indicate exploitation attempts.

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