Apache CloudStack: Authenticated pre-validation SSRF in registerTemplate

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-61422
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-21 09:16:39 UTC
Updated2026-08-21 09:16:39 UTC
DescriptionAuthenticated 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.

Risk And Classification

EPSS: 0.001320000 probability, percentile 0.032510000 (date 2026-08-21)

Problem Types: CWE-918 | CWE-918 CWE-918 Server-Side Request Forgery (SSRF)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache CloudStack affected 4.20.3.0 semver Not specified
CNA Apache Software Foundation Apache CloudStack affected 4.21.0.0 4.22.1.0 semver Not specified

References

ReferenceSourceLinkTags
lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc [email protected] lists.apache.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Yuliang Xiao <[email protected]> (en)

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