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CVE-2026-50222— Apache CloudStack: Improper access control in Userdata reference APIs

Quick assessment

Affected
Apache Software Foundation Apache CloudStack
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache CloudStack 用户数据引用 API 中存在缺失授权及向未授权主体暴露敏感信息的漏洞。 Apache CloudStack 中的多个与用户数据（userdata）相关的 API（包括 deleteUserData、linkUserDataToTemplate、resetUserDataForVirtualMachine、deployVirtualMachine 和 updateVirtualMachine）存在缺失或不足的身份验证和访问控制机制，可能导致跨租户/跨账户访问属于其他租户的用户数据资

AI Predicted 8.8 Difficulty: Moderate EPSS 0.13% · P3

Affected Version Matrix 2

VendorProduct Version RangeStatus
Apache Software Foundation Apache CloudStack 4.18.0.0≤ 4.20.3.0 affected
4.21.0.0≤ 4.22.1.0 affected
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I. Basic Information for CVE-2026-50222

Vulnerability Information
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Vulnerability Title
Apache CloudStack: Improper access control in Userdata reference APIs
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache CloudStack 4.18.0.0 ~ 4.20.3.0 -

II. Public POCs for CVE-2026-50222

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III. Intelligence Information for CVE-2026-50222

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Mailing List Discussions for CVE-2026-50222 (1)

Same Patch Batch · Apache Software Foundation · 2026-08-21 · 21 CVEs total

CVE-2026-59654 6.8 MEDIUM Apache CloudStack: DoS caused by database connections leak
CVE-2026-61398 Apache CloudStack: Cross-Site Scripting (XSS) Vulnerability in Instance Reset Password Fun
CVE-2026-68745 Apache CloudStack: SAML2 Signature Validation Silently Skipped for Cert-less IdP
CVE-2026-66797 Apache CloudStack: Unauthorised comment creation and disclosure
CVE-2026-66722 Apache CloudStack: ProjectRole & ProjectRolePermission authorization issue
CVE-2026-66721 Apache CloudStack: Authorization issue with listHostTags for domain admins
CVE-2026-65613 Apache CloudStack: Webhook Deliveries Incorrect Access
CVE-2026-62440 Apache CloudStack: Improper access control in Kubernetes Service (CKS) cluster manipulatio
CVE-2026-61422 Apache CloudStack: Authenticated pre-validation SSRF in registerTemplate
CVE-2026-61400 Apache CloudStack: Get and Run Diagnostics Command Injection
CVE-2026-61399 Apache CloudStack: Cross-Site Scripting (XSS) Vulnerability in Lock User Function in UI
CVE-2026-61397 Apache CloudStack: OAuth2 Token Cross-Request Leak
CVE-2026-59799 Apache CloudStack: Missing Privilege Check in Two-Factor Authentication Disable Flow
CVE-2026-59780 Apache CloudStack: LDAP provider configuration disclosure
CVE-2026-59657 Apache CloudStack: Sensitive Information Disclosure via Cleartext Storage in AsyncJob
CVE-2026-59655 Apache CloudStack: Unauthenticated OAuth provider client-secret disclosure
CVE-2026-59085 Apache CloudStack: Server-Side Request Forgery (SSRF) vulnerability in webhook module
CVE-2026-50112 Apache CloudStack: RCE and SSRF in direct download, metalink and NFS templates
CVE-2026-47359 Apache CloudStack: OS Command Injection due to unsanitized mount command
CVE-2026-63046 Apache InLong: Agent Installer — Command Injection to RCE via Default Credentials

IV. Related Vulnerabilities

Same product: Apache CloudStack
Same vendor: Apache Software Foundation
Same weakness: CWE-862

V. Comments for CVE-2026-50222

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