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Message-ID: <10c796d8-d900-4d3c-9ae1-d1b838ce8ec2@apache.org>
Date: Fri, 8 May 2026 14:21:09 +0200
From: "Piotr P. Karwasz" <pkarwasz@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2026-25077: Apache CloudStack: Unauthenticated Command Injection
in Direct Download Templates
Severity: important
Affected versions:
- Apache CloudStack 4.11.0 through 4.20.2.0
- Apache CloudStack 4.21.0.0 through 4.22.0.0
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.
Credit:
Reza at HazardLab (https://hazardlab.ninja) (reporter)
References:
https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xm
https://cloudstack.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-25077
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