CVE-2026-13185 PersistenceFramework Cookie Deserialization Vulnerability in Telerik UI for ASP.NET AJAX
Unauthenticated attackers can achieve remote code execution by sending malicious cookies to applications using cookie-based storage in Telerik UI for ASP.NET AJAX.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-13185?
CVE-2026-13185 is a high-severity unsafe deserialization vulnerability in Progress Software Telerik UI for ASP.NET AJAX, published on 22 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Progress® Telerik® UI for AJAX prior to v2026.2.708, applications using cookie-based storage in RadPersistenceManager or RadDockLayout deserialize attacker-controlled cookie content, allowing unauthenticated remote code execution.
Weakness: CWE-502
Which versions are affected by CVE-2026-13185?
It affects 1 product.
Products include Progress Telerik Ui for Asp.net Ajax.
How do I fix CVE-2026-13185?
No fix has been published for CVE-2026-13185 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-13185 being exploited?
There is no known exploitation of CVE-2026-13185 in the wild and no public exploit code.
Other vulnerabilities in Progress Software Telerik UI for ASP.NET AJAX
- CVE-2017-11357 Telerik UI for ASP.NET AJAX Insecure Direct Object Reference
- CVE-2021-28141 Missing authorization in n/a
- CVE-2019-19790 Path traversal in n/a
- CVE-2026-13181 RadAsyncUpload AsyncUploadTypeName Type Resolution Vulnerability in Telerik UI for ASP.NET AJAX
- CVE-2026-13186 AppDataStorageProvider Path Traversal Deserialization Vulnerability in Telerik UI for ASP.NET AJAX
Sources
Also known as GHSA-j72w-hfj3-hj2x.