CVE-2026-66721CWE-862broken-access-control

CVE-2026-66721

Low · published August 21, 2026

CVSS v3.1
2.7
EPSS
0%
Percentile
40.1
In the wild
Unconfirmed
What it is

Missing authorization issue for domain admins in CloudStack's host tags listing functionality.

Domain Admins, by default, have permission to call the listHostTags API, but the API returns host tags for every host in the environment without domain scoping. It should instead be restricted to only the hosts dedicated to that admin's domain.

This issue affects Apache CloudStack: from 4.12.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.

Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.

The record
Technical detail
CVSS v3.1
2.7 · LOW
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00476 · 40.1th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-08-21T13:16Z
Affected products (2)
ProductVersionsFixed in
apache/cloudstack≥ 4.12.0.0, < 4.20.3.14.20.3.1
apache/cloudstack≥ 4.21.0.0, < 4.22.1.14.22.1.1
References (1)
EPSS history
Timeline
  • 21 AUG 08:23Z
    Apache CloudStack: Authorization issue with listHostTags for domain admins
    cvelistv5