CVE-2026-50222 PUBLISHED

Apache CloudStack: Improper access control in Userdata reference APIs

Assigner: apache
Reserved: 04.06.2026 Published: 21.08.2026 Updated: 21.08.2026

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.

Product Status

Vendor Apache Software Foundation
Product Apache CloudStack
Versions Default: unaffected
  • affected from 4.18.0.0 to 4.20.3.0 (incl.)
  • affected from 4.21.0.0 to 4.22.1.0 (incl.)

Credits

  • Bernardo De Marco Gonçalves <bernardomg2004@gmail.com> reporter
  • Yuliang Xiao <xyl1509410143@outlook.com> reporter
  • Łukasz Bawolski <Lukasz.Bawolski@exea.pl> reporter
  • George Chen (GitHub: geo-chen) reporter
  • KQ Wu <kqmailbox@163.com> reporter

References

Problem Types

  • CWE-862 Missing Authorization CWE
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor CWE