Vulnerability Details CVE-2026-61399
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 20.2%
CVSS Severity
CVSS v3 Score 4.8
Products affected by CVE-2026-61399
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cpe:2.3:a:apache:cloudstack:4.20.0.0
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cpe:2.3:a:apache:cloudstack:4.20.1.0
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cpe:2.3:a:apache:cloudstack:4.20.2.0
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cpe:2.3:a:apache:cloudstack:4.20.3.0
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cpe:2.3:a:apache:cloudstack:4.21.0.0
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cpe:2.3:a:apache:cloudstack:4.22.0.0
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cpe:2.3:a:apache:cloudstack:4.22.0.1
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cpe:2.3:a:apache:cloudstack:4.22.1.0