Vulnerability Details CVE-2026-50222
Missing Authorization, Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache CloudStack's Userdata reference APIs.
Several userdata-related APIs in Apache CloudStack, including deleteUserData, linkUserDataToTemplate, resetUserDataForVirtualMachine, deployVirtualMachine, and updateVirtualMachine, exhibit missing or insufficient access control validation, potentially allowing cross-tenant/cross-account access to userdata resources that belong to other tenants.
This issue affects Apache CloudStack: from 4.18.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.
The deleteCniConfiguration API, introduced in 4.21.0.0, also exhibits similar behaviour and lacks access validation.
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 23.0%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-50222
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cpe:2.3:a:apache:cloudstack:4.18.0.0
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cpe:2.3:a:apache:cloudstack:4.18.1.0
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cpe:2.3:a:apache:cloudstack:4.18.1.1
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cpe:2.3:a:apache:cloudstack:4.18.2.0
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cpe:2.3:a:apache:cloudstack:4.18.2.1
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cpe:2.3:a:apache:cloudstack:4.18.2.2
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cpe:2.3:a:apache:cloudstack:4.18.2.3
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cpe:2.3:a:apache:cloudstack:4.18.2.4
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cpe:2.3:a:apache:cloudstack:4.18.2.5
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cpe:2.3:a:apache:cloudstack:4.19.0.0
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cpe:2.3:a:apache:cloudstack:4.19.0.1
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cpe:2.3:a:apache:cloudstack:4.19.0.2
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cpe:2.3:a:apache:cloudstack:4.19.1.0
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cpe:2.3:a:apache:cloudstack:4.19.1.1
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cpe:2.3:a:apache:cloudstack:4.19.1.2
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cpe:2.3:a:apache:cloudstack:4.19.1.3
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cpe:2.3:a:apache:cloudstack:4.19.2.0
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cpe:2.3:a:apache:cloudstack:4.19.3.0
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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