CVE-2026-66797: CWE-284 Improper Access Control in Apache Software Foundation Apache CloudStack
CVE-2026-66797 is an improper access control vulnerability in Apache CloudStack's annotation functionality. It allows any authenticated user to create and view annotations on entities they do not own by exploiting incorrect ownership checks in the addAnnotation and listAnnotation APIs. This affects Apache CloudStack versions from 4.15.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0. The issue is fixed in versions 4.20.3.1 and 4.22.1.1 or later.
AI Analysis
Technical Summary
The vulnerability in Apache CloudStack arises from the addAnnotation and listAnnotation APIs failing to properly enforce ownership checks when an entity's UUID is specified. Although these APIs perform an ownership check, they do not honor its result correctly, enabling any authenticated user to write annotations to and disclose existing annotations on entities they do not own. This improper access control issue is classified under CWE-284 and affects Apache CloudStack versions 4.15.0.0 through 4.20.3.0 and 4.21.0.0 through 4.22.1.0. The vendor has addressed the issue in versions 4.20.3.1 and 4.22.1.1.
Potential Impact
Authenticated users can bypass intended ownership restrictions to create and view annotations on entities they do not own. This could lead to unauthorized disclosure of information and unauthorized modification of annotations within the affected Apache CloudStack deployments.
Mitigation Recommendations
Users should upgrade Apache CloudStack to version 4.20.3.1 or 4.22.1.1 or later, where this improper access control vulnerability has been fixed. Patch status is confirmed by the vendor advisory recommending these versions. No other mitigation is indicated.
CVE-2026-66797: CWE-284 Improper Access Control in Apache Software Foundation Apache CloudStack
Description
CVE-2026-66797 is an improper access control vulnerability in Apache CloudStack's annotation functionality. It allows any authenticated user to create and view annotations on entities they do not own by exploiting incorrect ownership checks in the addAnnotation and listAnnotation APIs. This affects Apache CloudStack versions from 4.15.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0. The issue is fixed in versions 4.20.3.1 and 4.22.1.1 or later.
Affected software
pkg:maven/org.apache.cloudstack/cloudstackRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Apache CloudStack arises from the addAnnotation and listAnnotation APIs failing to properly enforce ownership checks when an entity's UUID is specified. Although these APIs perform an ownership check, they do not honor its result correctly, enabling any authenticated user to write annotations to and disclose existing annotations on entities they do not own. This improper access control issue is classified under CWE-284 and affects Apache CloudStack versions 4.15.0.0 through 4.20.3.0 and 4.21.0.0 through 4.22.1.0. The vendor has addressed the issue in versions 4.20.3.1 and 4.22.1.1.
Potential Impact
Authenticated users can bypass intended ownership restrictions to create and view annotations on entities they do not own. This could lead to unauthorized disclosure of information and unauthorized modification of annotations within the affected Apache CloudStack deployments.
Mitigation Recommendations
Users should upgrade Apache CloudStack to version 4.20.3.1 or 4.22.1.1 or later, where this improper access control vulnerability has been fixed. Patch status is confirmed by the vendor advisory recommending these versions. No other mitigation is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-07-27T18:09:26.783Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a88309facd9273b4907b8af
Added to database: 08/21/2026, 11:03:59 UTC
Last enriched: 08/21/2026, 11:07:50 UTC
Last updated: 08/21/2026, 17:51:58 UTC
Views: 7
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