CVE-2026-3563 Denial of service in PowerShell Universal

Medium 5.5 Published 17 Mar 2026 Updated 17 Mar 2026

Authenticated users can override system routes via improper input validation, causing denial of service in PowerShell Universal.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-3563?

CVE-2026-3563 is a medium-severity denial of service vulnerability in Devolutions PowerShell Universal, published on 17 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Improper input validation in the apps and endpoints configuration in PowerShell Universal before 2026.1.4 allows an authenticated user with permissions to create or modify Apps or Endpoints to override existing application or system routes, resulting in unintended request routing and denial of service via a conflicting URL path.

Weakness: CWE-1289

Which versions are affected by CVE-2026-3563?

It affects 1 product.

Products include Ironmansoftware Powershell Universal.

How do I fix CVE-2026-3563?

No fix has been published for CVE-2026-3563 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-2026-3563 being exploited?

There is no known exploitation of CVE-2026-3563 in the wild and no public exploit code.

Sources

Also known as GHSA-gx25-v2f3-ppxq.