CVE-2025-66467: Apache CloudStack: MinIO policy remains intact on bucket deletion

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-08 · updated 2026-10-07
Weakness: CWE-459

Description

Missing MinIO policy cleanup on bucket deletion via Apache CloudStack allows users to retain access to buckets which they previously owned. If another user creates a new bucket with the same name, the previous owners can gain unauthorized read and write access to it by using the previously generated access and secret keys. Users are recommended to upgrade to Apache CloudStack versions 4.20.3.0 or 4.22.0.1, or later, which fixes this issue.

Affected products

Apache Software Foundation Apache CloudStack: from 4.19.0.0 before 4.20.3.0; from 4.21.0.0 before 4.22.0.1 — fixed in 4.20.3.0, 4.22.0.1

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache CloudStack 4.20.3.0, 4.22.0.1. Check the vendor advisory for mitigations.

References

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