CVE-2026-25077
Modified Modified - Updated After Analysis
Arbitrary Code Execution in Apache CloudStack KVM Templates

Publication date: 2026-05-08

Last updated on: 2026-05-10

Assigner: Apache Software Foundation

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.
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Meta Information
Published
2026-05-08
Last Modified
2026-05-10
Generated
2026-06-19
AI Q&A
2026-05-08
EPSS Evaluated
2026-06-18
NVD
CVE-2026-25077
EUVD
EUVD-2026-28549
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
apache cloudstack From 4.21.0.0 (inc) to 4.22.0.1 (exc)
apache cloudstack From 4.11.0.0 (inc) to 4.20.3.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
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Executive Summary

This vulnerability occurs because account users are allowed by default to register templates that can be downloaded directly to the primary storage used for deploying instances with the KVM hypervisor.

Due to missing file name sanitization, an attacker can register malicious templates that execute arbitrary code on the KVM hosts.

Impact Analysis

Exploitation of this vulnerability can lead to compromise of resource integrity and confidentiality.

It can also cause data loss, denial of service, and affect the availability of the KVM-based infrastructure managed by CloudStack.

Mitigation Strategies

Users are recommended to upgrade to Apache CloudStack versions 4.20.3.0 or 4.22.0.1, or later, which fixes this issue.

Compliance Impact

The vulnerability allows attackers to execute arbitrary code on KVM hosts, potentially compromising resource integrity and confidentiality, causing data loss, denial of service, and affecting availability of the infrastructure.

Such impacts on confidentiality, integrity, and availability could negatively affect compliance with standards and regulations like GDPR and HIPAA, which require protection of sensitive data and system availability.

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