---
id: CVE-2026-61422
title: >-
  Authenticated pre-validation SSRF vulnerability in Apache CloudStack's
  template and ISO registration functionality.


  When registering a template or ISO, CloudStack makes a live HTTP HEAD/GET call
  to determine file size for secondary stor…
summary: >-
  Authenticated pre-validation SSRF vulnerability in Apache CloudStack's
  template and ISO registration functionality.


  When registering a template or ISO, CloudStack makes a live HTTP HEAD/GET call
  to determine file size for secondary stor…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-918
vendor: apache
product: cloudstack
affected:
  - 'cloudstack >= 4.21.0.0, < 4.22.1.1'
  - cloudstack = 4.20.3.0
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-2026-61422'
references:
  - url: 'https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc'
    label: security@apache.org
tags:
  - nvd
epss: 0.00415
epssPercentile: 0.35651
ingestedAt: '2026-10-27T18:52:09.894Z'
---

## Overview

Authenticated pre-validation SSRF vulnerability in Apache CloudStack's template and ISO registration functionality.

When registering a template or ISO, CloudStack makes a live HTTP HEAD/GET call to determine file size for secondary storage usage-limit checks, and this happens before URL validation is performed. However, this does not pose a malicious template or ISO registration risk, as URL validation still occurs prior to the actual download by the Secondary Storage VM.This issue affects Apache CloudStack: in 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.

## Affected

- `cloudstack >= 4.21.0.0, < 4.22.1.1`
- `cloudstack = 4.20.3.0`

## Remediation

Upgrade past the affected range:

- `cloudstack 4.22.1.1`