CVE-2026-4064 Missing authorization in PowerShell Universal

High 8.3 Published 17 Mar 2026 Updated 17 Mar 2026

Authenticated users can bypass role-based access controls to perform privileged operations, read sensitive data, and disrupt services in PowerShell Universal.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-4064?

CVE-2026-4064 is a high-severity missing authorization vulnerability in Devolutions PowerShell Universal, published on 17 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Missing authorization checks on multiple gRPC service endpoints in PowerShell Universal before 2026.1.4 allows an authenticated user with any valid token to bypass role-based access controls and perform privileged operations — including reading sensitive data, creating or deleting resources, and disrupting service operations — via crafted gRPC requests.

Weakness: CWE-862

Which versions are affected by CVE-2026-4064?

It affects 1 product.

Products include Ironmansoftware Powershell Universal.

How do I fix CVE-2026-4064?

No fix has been published for CVE-2026-4064 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-4064 being exploited?

There is no known exploitation of CVE-2026-4064 in the wild and no public exploit code.

Sources

Also known as GHSA-979h-vff8-97jm.