CVE-2026-61399
Received Received - Intake

Improper Output Encoding in Apache CloudStack UI

Publication date: 2026-08-21

Last updated on: 2026-08-21

Assigner: Apache Software Foundation

Description
Improper Encoding or Escaping of Output vulnerability in Apache CloudStack's UI while using Lock User Functionality. This issue affects Apache CloudStack: from 4.20.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0. Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.

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Meta Information

Published
2026-08-21
Last Modified
2026-08-21
Generated
2026-08-21
AI Q&A
2026-08-21
EPSS Evaluated
N/A
NVD
CVE-2026-61399
EUVD
EUVD-2026-63838

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
apache cloudstack From 4.20.0.0 (inc) to 4.20.3.0 (inc)
apache cloudstack From 4.21.0.0 (inc) to 4.22.1.0 (inc)
apache cloudstack 4.20.3.1
apache cloudstack 4.22.1.1

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-116 The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.

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Executive Summary

This vulnerability is an Improper Encoding or Escaping of Output issue in Apache CloudStack's UI when using the Lock User Functionality. It affects versions from 4.20.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.

Detection Guidance

This vulnerability involves improper encoding in Apache CloudStack's UI lock user functionality. To detect it, inspect the UI for user lock operations and verify that output is properly encoded. Check for unusual characters or behaviors in user management interfaces. No specific commands are provided in the context.

Impact Analysis

An attacker could exploit this to inject malicious scripts or commands into the UI, potentially leading to unauthorized actions or data theft. Users should upgrade to version 4.20.3.1 or 4.22.1.1 or later to mitigate this risk.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate GDPR or HIPAA requirements for data protection and security. Organizations should address it promptly to maintain compliance.

Mitigation Strategies

Upgrade Apache CloudStack to version 4.20.3.1, 4.22.1.1, or later to fix the vulnerability.

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