CVE-2026-124699 Improper Control of Generation of Code in Progress Telerik UI for WinForms
Attackers supplying crafted expressions can execute code in applications using Telerik UI for WinForms.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Harmful if only installed
- No
- Needs a specific call
- Yes
- Fix
- None listed
What is CVE-2026-124699?
CVE-2026-124699 is a high-severity code injection vulnerability in Progress Software Telerik UI for WinForms, published on 12 Nov 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
In Telerik UI for WinForms, versions prior to 2026.4.1111, an improper control of code generation vulnerability exists that allows an attacker to supply a crafted expression and execute unauthorized code in the context of the affected application.
Weakness: CWE-94
Which versions are affected by CVE-2026-124699?
An affected version is only exploitable if your software uses the vulnerable function or option. Many projects that include it are not exposed.
How do I fix CVE-2026-124699?
No fix has been published for CVE-2026-124699 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-2026-124699 being exploited?
There is no known exploitation of CVE-2026-124699 in the wild and no public exploit code.
Sources
Also known as GHSA-xvm9-j48x-qjgx.