CVE-2026-5374 runZero Platform MCP information leak

Medium 5.8 Published 7 Apr 2026 Updated 7 Apr 2026

MCP agents could access unauthorized remediation and asset data due to incorrect authorization checks in the runZero Platform.

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-2026-5374?

CVE-2026-5374 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 MCP agents to access remediation and asset information 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:H/I:N/A:N (5.8 Medium). This issue was fixed in version 4.0.260202.0 of the runZero Platform.

Weakness: CWE-863

Which versions are affected by CVE-2026-5374?

It affects 1 product.

Products include Runzero Runzero Platform.

How do I fix CVE-2026-5374?

No fix has been published for CVE-2026-5374 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-2026-5374 being exploited?

There is no known exploitation of CVE-2026-5374 in the wild and no public exploit code.

Sources

Also known as GHSA-9359-vm49-5gpx.