CVE-2026-66797
CVE-2026-66797: 2 tracked advisory records across Apache, Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Apache
1 advisory- Advisory severityMedium5.4
Medium [CVE-2026-66797] Apache CloudStack: Improper access control in CloudStack's annotation functionality allows unauthorized comment creation and disclosure
CVE-2026-66797Source published Source updated
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 in this advisory
- Apache CloudStack
- Source-reported affected versions
- 4.15.0.0 through 4.20.3.0
- 4.21.0.0 through 4.22.1.0.
- through 4.22.1.0
- Source-reported fixed versions
- 4.20.3.1
- 4.22.1.1
- Mitigation guidance
- Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.
Red Hat
1 advisory- Advisory severityHigh8.5
High [CVE-2026-66797] Velero Restore includes cluster-scoped RBAC resources with no exclusion — tampered backup yields hub cluster-admin
CVE-2026-66797Source published Source updated
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. A flaw was found in the cluster-backup-operator. An attacker with write access to the backup storage location or the ability to create a Velero Backup object can inject…
- Affected products in this advisory
- Red Hat Advanced Cluster Management for Kubernetes 2.11
- Red Hat Advanced Cluster Management for Kubernetes 2.13
- Red Hat Advanced Cluster Management for Kubernetes 2.14
- Red Hat Advanced Cluster Management for Kubernetes 2.15
2 more entries in the full advisory.
- Source-reported affected versions
- 4.15.0.0
- 4.20.3.0
- 4.21.0.0
- 4.22.1.0
- Source-reported fixed versions
- 4.20.3.1
- 4.22.1.1
- rhacm2/cluster-backup-rhel9-operator:1787684668
- rhacm2/cluster-backup-rhel9-operator:1787259060
10 more entries in the full advisory.
- Mitigation guidance
- Restrict access to the backup storage location (e.g., S3 bucket) to authorized personnel only. Implement strict Role-Based Access Control (RBAC) to limit which users or service accounts can create Velero Backup objects within the open-cluster-management-backup namespace. This prevents an attacker from injecting malicious ClusterRoleBindings into backups or referencing untrusted backup objects. Ensure that only trusted and verified backups are used for restore operations.
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