CVE-2026-25077

high

Published 2026-05-08 · Modified 2026-05-10

CVSS v3

8.8

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2

—

VIR risk

8.8

Description

Account users are allowed by default to register templates to be downloaded directly to the primary storage for deploying instances using the KVM hypervisor. Due to missing file name sanitization, an attacker can register malicious templates to execute arbitrary code on the KVM hosts. This can result in the compromise of resource integrity and confidentiality, data loss, denial of service, and availability of the KVM-based infrastructure managed by CloudStack. Users are recommended to upgrade to Apache CloudStack versions 4.20.3.0 or 4.22.0.1, or later, which fixes this issue.

Predictions

Exploit likelihood

92%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: security@apache.org — https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xm

Application impact

Vendor	Product	Versions	Fixed
apache	cloudstack	`{"startIncluding":"4.11.0.0","endExcluding":"4.20.3.0"}`	`4.20.3.0`

References

CWEs

CWE-94

Verify integrity in audit chain (admin only). AS-IS.