CVE-2026-5383 runZero Explorer missing authorization check

Medium 4.4 Published 7 Apr 2026 Updated 7 Apr 2026

Attackers can access Explorer groups outside their authorized scope, potentially reading or modifying data.

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-2026-5383?

CVE-2026-5383 is a medium-severity missing authorization vulnerability in runZero Explorer, published on 7 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

An issue that could allow access to Explorer groups from outside of the 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:L/A:L (4.4 Medium). This issue was fixed in version 4.0.260208.0 of the runZero Explorer.

Weakness: CWE-863

Which versions are affected by CVE-2026-5383?

It affects 1 product.

Products include Runzero Runzero Platform.

How do I fix CVE-2026-5383?

No fix has been published for CVE-2026-5383 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-2026-5383 being exploited?

There is no known exploitation of CVE-2026-5383 in the wild and no public exploit code.

Sources

Also known as GHSA-542q-mcfv-688v.