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TI-2026-36894 Aliases CVE-2026-50112GHSA-qh8m-g3r9-6vh2

Apache CloudStack: RCE and SSRF in direct download, metalink and NFS templates

Priority MEDIUM 41CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-78.

Summary

SSRF via Metalink Mirror URL Resolution: 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. RCE on KVM hypervisor via NFS, Metalink files with/without Direct Downloads: 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. 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. 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. Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00723 54th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache CloudStack4.14.0.0 – 4.20.3.0; 4.21.0.0 – 4.22.1.0—No fix listedCNA
  • Apache CloudStack VendorApache Affected 4.14.0.0 – 4.20.3.0; 4.21.0.0 – 4.22.1.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*4.14.0.0 to before 4.20.3.1; 4.21.0.0 to before 4.22.1.1VulnerableApache
  • cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:* Versions 4.14.0.0 to before 4.20.3.1; 4.21.0.0 to before 4.22.1.1 Vulnerable ·Apache

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Apache CloudStack — lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc

    19 records Highest priority Priority MEDIUM 11 MEDIUM, 8 LOW

    Other records, highest priority first

    • TI-2026-44554 Apache CloudStack: Improper access control in Kubernetes Service (CKS) cluster manipulationPriority MEDIUM 48
    • TI-2026-44020 Apache CloudStack: Cross-Site Scripting (XSS) Vulnerability in Instance Reset Password Function in UIPriority MEDIUM 48
    • TI-2026-42265 Apache CloudStack: Server-Side Request Forgery (SSRF) vulnerability in webhook modulePriority MEDIUM 48
    Show all 19 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-50112
  2. 2026-10-03 Alias added: GHSA-qh8m-g3r9-6vh2

References

Advisory 1

  • TI-2024-27459 Apache CloudStack: SAML Signature Exclusion CVSS 3.1HIGH 8.1
  • TI-2024-25607 Apache CloudStack: Unauthenticated cluster service port leads to remote execution CVSS 3.1CRITICAL 9.8
  • TI-2022-16183 Apache CloudStack SAML Single Sign-On XXE CVSS 3.1CRITICAL 9.8
  • TI-2012-03843 Citrix Cloud.com CloudStack, and Apache CloudStack pre-release, allows remote attackers… CVSS 2.0HIGH 10.0
  • TI-2024-26763 Apache CloudStack: Integration API service uses dynamic port when disabled CVSS 3.1CRITICAL 9.8
  • TI-2016-05854 Apache CloudStack 4.1 to 4.8.1.0 and 4.9.0.0 contain an API call designed to allow a user… CVSS 3.1CRITICAL 9.8
See all 64 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences