CVE-2026-106164 Infinite Loop in Telerik Document Processing XLS Import
An attacker can cause a denial of service by uploading a corrupted XLS file that triggers an infinite loop in the Telerik SpreadProcessing library.
- 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-2026-106164?
CVE-2026-106164 is a high-severity denial of service vulnerability in Progress Software Telerik Document Processing Libraries, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Progress® Telerik® Document Processing SpreadProcessing library, versions prior to 2026.3.1006, an infinite loop vulnerability exists when importing an XLS file with a specifically-targted corruption, the import timeout is ignored resulting in an unresponsive CPU thread and denial of service.
Weakness: CWE-835
Which versions are affected by CVE-2026-106164?
How do I fix CVE-2026-106164?
No fix has been published for CVE-2026-106164 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-106164 being exploited?
There is no known exploitation of CVE-2026-106164 in the wild and no public exploit code.
Sources
Also known as GHSA-3g99-jr36-v2mm.