CVE-2026-5378 runZero Platform user creation leak

Medium 5.8 Published 7 Apr 2026 Updated 7 Apr 2026

Administrators can create or update users outside their authorized organization scope, allowing unauthorized data modification.

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-2026-5378?

CVE-2026-5378 is a medium-severity missing authorization vulnerability in runZero Platform, published on 7 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

An issue that allowed administrators to create and update users outside of their authorized organization scope has been resolved. This is an instance of CWE-863: Incorrect Authorization, and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N (5.8 Medium). This issue was fixed in version 4.0.260203.0 of the runZero Platform.

Weakness: CWE-863

Which versions are affected by CVE-2026-5378?

It affects 1 product.

Products include Runzero Runzero Platform.

How do I fix CVE-2026-5378?

No fix has been published for CVE-2026-5378 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-2026-5378 being exploited?

There is no known exploitation of CVE-2026-5378 in the wild and no public exploit code.

Sources

Also known as GHSA-v27j-88v5-qwrq.