CVE-2026-13181 RadAsyncUpload AsyncUploadTypeName Type Resolution Vulnerability in Telerik UI for ASP.NET AJAX

High 8.1 Published 22 Jul 2026 Updated 24 Jul 2026

Attackers can achieve remote code execution by forging upload metadata to trigger unsafe type resolution 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-2026-13181?

CVE-2026-13181 is a high-severity code injection 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, forged upload metadata can influence AsyncUploadTypeName processing and trigger unsafe attacker-controlled type resolution, enabling remote code execution in affected deployments.

Weakness: CWE-470

Which versions are affected by CVE-2026-13181?

It affects 1 product.

Products include Progress Telerik Ui for Asp.net Ajax.

How do I fix CVE-2026-13181?

No fix has been published for CVE-2026-13181 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2026-13181 being exploited?

There is no known exploitation of CVE-2026-13181 in the wild and no public exploit code.

Public exploit code: 2 proofs of concept on GitHub.

Sources

Also known as GHSA-78c9-2h53-ghvw.