VDB
CVE-2026-66797
CVE-2026-66797
PUBLISHED
CVSS 5.4 MEDIUM
Reported by apache · Published August 21, 2026
Improper access control in CloudStack's annotation functionality allows unauthorized comment creation and disclosure. The addAnnotation and listAnnotation APIs perform an ownership check when an entity's UUID is specified, but fail to honor its result correctly. This lets any authenticated user write annotations to, and disclose existing annotations/comments on, an entity they don't own by simply supplying its UUID. This issue affects Apache CloudStack: from 4.15.0.0 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.
Risk Scores
CVSS 3.1
5.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache CloudStack | 4.16.0.0, 4.21.0.0 |
| Apache Software Foundation | Apache CloudStack | 4.16.0.0, 4.21.0.0 |
Timeline
- Aug 21, 2026 EPSS Score
- Aug 21, 2026 CVE Published
- Aug 22, 2026 Coalition ESS Score
- Aug 24, 2026 EPSS Score
- Aug 27, 2026 CVE Updated
- Aug 28, 2026 EPSS Score