CVE-2026-18672 RadImageEditor ClientState Unauthenticated Arbitrary File Read Vulnerability in Telerik UI for ASP.NET AJAX
An unauthenticated attacker can read arbitrary files outside intended directories via insufficient validation in the RadImageEditor control.
- 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-2026-18672?
CVE-2026-18672 is a high-severity path traversal vulnerability in Progress Software Telerik UI for ASP.NET AJAX, published on 2 Sep 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 v2026.3.812, insufficient validation of client-supplied state in RadImageEditor may allow an attacker to influence which file is returned by the control's image cache, potentially exposing file contents outside the intended image directories.
Weakness: CWE-22
Which versions are affected by CVE-2026-18672?
How do I fix CVE-2026-18672?
No fix has been published for CVE-2026-18672 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-18672 being exploited?
There is no known exploitation of CVE-2026-18672 in the wild and no public exploit code.
Sources
Also known as GHSA-4j6f-v242-c6x4.