{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-50112","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","state":"PUBLISHED","assignerShortName":"apache","dateReserved":"2026-06-03T15:48:58.143Z","datePublished":"2026-08-21T08:29:41.036Z","dateUpdated":"2026-08-22T03:56:23.094Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Apache CloudStack","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"4.20.3.0","status":"affected","version":"4.14.0.0","versionType":"semver"},{"lessThanOrEqual":"4.22.1.0","status":"affected","version":"4.21.0.0","versionType":"semver"}]}],"credits":[{"lang":"en","type":"reporter","value":"K"},{"lang":"en","type":"reporter","value":"Samy Ghannad <samy@samyghannad.com>"},{"lang":"en","type":"reporter","value":"Katriel Moses <katriel.moses@gmail.com>"},{"lang":"en","type":"reporter","value":"Venkatraman Kumar <venkatraman.kumar@securin.io>"},{"lang":"en","type":"reporter","value":"Łukasz Bawolski <Lukasz.Bawolski@exea.pl>"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p><b>SSRF via Metalink Mirror URL Resolution:</b></p><p>An authenticated tenant can register a template pointing to an attacker-controlled metalink file containing internal targets. The Secondary Storage VM will retrieve the data and persist it as a template file, which can later be downloaded through normal APIs.</p><p><b>RCE on KVM hypervisor via NFS, Metalink files with/without Direct Downloads:</b></p><p>An authenticated CloudStack tenant holding the default User role can execute arbitrary shell commands as root on the KVM hypervisor host that runs other tenants' VMs. This is cross-tenant root on the underlying compute, reachable via the public CloudStack API.<br></p><p>When a User registers a VM template with directDownload=true and a URL pointing to a .metalink file, the management server fetches the metalink XML and dispatches download to the KVM agent. Inner URLs inside the metalink XML are never re-validated against the scheme allowlist.<br></p><p>These issues affect Apache CloudStack: from 4.14.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.</p><p>Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.</p>"}],"value":"SSRF via Metalink Mirror URL Resolution:\n\nAn authenticated tenant can register a template pointing to an attacker-controlled metalink file containing internal targets. The Secondary Storage VM will retrieve the data and persist it as a template file, which can later be downloaded through normal APIs.\n\nRCE on KVM hypervisor via NFS, Metalink files with/without Direct Downloads:\n\nAn authenticated CloudStack tenant holding the default User role can execute arbitrary shell commands as root on the KVM hypervisor host that runs other tenants' VMs. This is cross-tenant root on the underlying compute, reachable via the public CloudStack API.\n\n\nWhen a User registers a VM template with directDownload=true and a URL pointing to a .metalink file, the management server fetches the metalink XML and dispatches download to the KVM agent. Inner URLs inside the metalink XML are never re-validated against the scheme allowlist.\n\n\nThese issues affect Apache CloudStack: from 4.14.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.\n\nUsers are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue."}],"metrics":[{"other":{"content":{"text":"critical"},"type":"Textual description of severity"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-78","description":"CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-918","description":"CWE-918 Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","shortName":"apache","dateUpdated":"2026-08-21T08:29:41.036Z"},"references":[{"tags":["vendor-advisory"],"url":"https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc"}],"source":{"discovery":"UNKNOWN"},"title":"Apache CloudStack: RCE and SSRF in direct download, metalink and NFS templates","x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":8.8,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-21T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-50112"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-22T03:56:23.094Z"}}]}}