CVE-2026-50112
Authenticated tenant can trigger root RCE on KVM via CloudStack metalink SSRF.
Is CVE-2026-50112 being exploited?
Not confirmed. CVE-2026-50112 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.46% probability of exploitation in the next 30 days.
How severe is CVE-2026-50112?
CVE-2026-50112 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-50112?
Yes. A fix has been recorded for CVE-2026-50112. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-50112 affect?
CVE-2026-50112 affects Apache CloudStack 4.14.0.0 - 4.20.3.0, Apache CloudStack 4.21.0.0 - 4.22.1.0, KVM hypervisor hosts using CloudStack Secondary Storage/NFS. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-50112?
Upgrade to 4.20.3.1 or 4.22.1.1+; block/untrust metalink files and restrict template uploads.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated CloudStack user can achieve cross-tenant root remote code execution on KVM hypervisor via crafted .metalink downloads.
Immediate action required
- affected>= 4.14.0.0 and <= 4.20.3.0
- affected>= 4.21.0.0 and <= 4.22.1.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.