Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache CloudStack | 4.16.0.0 – ≤ 4.20.3.0, 4.21.0.0 – ≤ 4.22.1.0 | — |
Advisories 2
- NCSC-2026-0332 Kwetsbaarheden verholpen in Apache CloudStack NCSC-NL (Netherlands) · Aug 27, 2026
- WID-SEC-2026-2962 Apache CloudStack: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 23, 2026
References
- https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc vendor-advisory