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

High 8.0 Published 8 May 2026 Updated 9 May 2026

Attackers can retain unauthorized access to new buckets with reused names due to missing policy cleanup on deletion in Apache CloudStack.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2025-66467?

CVE-2025-66467 is a high-severity missing authorization vulnerability in Apache Cloudstack, published on 8 May 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-459

Which versions are affected by CVE-2025-66467?

It affects 1 product.

Products include Apache Cloudstack.

How do I fix CVE-2025-66467?

No fix has been published for CVE-2025-66467 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2025-66467 being exploited?

There is no known exploitation of CVE-2025-66467 in the wild and no public exploit code.

All Apache Cloudstack vulnerabilities

Sources

Also known as GHSA-8fr5-rq46-q395.