---
id: CVE-2026-50222
title: >-
  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,
  linkUserDataTo…
summary: >-
  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,
  linkUserDataTo…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-200
  - CWE-862
vendor: apache
product: cloudstack
affected:
  - 'cloudstack >= 4.18.0.0, < 4.20.3.1'
  - 'cloudstack >= 4.21.0.0, < 4.22.1.1'
patched:
  - cloudstack 4.22.1.1
published: '2026-08-21'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:10:00.103'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-50222'
references:
  - url: 'https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc'
    label: security@apache.org
tags:
  - nvd
epss: 0.00539
epssPercentile: 0.4518
ingestedAt: '2026-10-27T18:52:09.888Z'
---

## Overview

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.

## Affected

- `cloudstack >= 4.18.0.0, < 4.20.3.1`
- `cloudstack >= 4.21.0.0, < 4.22.1.1`

## Remediation

Upgrade past the affected range:

- `cloudstack 4.22.1.1`