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TI-2026-20257 Aliases CVE-2026-25077GHSA-vhgc-6rjx-f6vv

Apache CloudStack: Unauthenticated Command Injection in Direct Download Templates

Priority MEDIUM 41CWE-94Published · 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-94.

Summary

Account users are allowed by default to register templates to be downloaded directly to the primary storage for deploying instances using the KVM hypervisor. Due to missing file name sanitization, an attacker can register malicious templates to execute arbitrary code on the KVM hosts. This can result in the compromise of resource integrity and confidentiality, data loss, denial of service, and availability of the KVM-based infrastructure managed by CloudStack. Users are recommended to upgrade to Apache CloudStack versions 4.20.3.0 or 4.22.0.1, or later, which fixes this issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00726 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 CloudStack4.11.0 – 4.20.2.0; 4.21.0.0 – 4.22.0.0—No fix listedCNA
  • Apache CloudStack VendorApache Affected 4.11.0 – 4.20.2.0; 4.21.0.0 – 4.22.0.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*4.11.0.0 to before 4.20.3.0; 4.21.0.0 to before 4.22.0.1VulnerableApache
  • cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:* Versions 4.11.0.0 to before 4.20.3.0; 4.21.0.0 to before 4.22.0.1 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/n8mt5b7wkpysstb8w7rr9f02kc5cq2xm

    7 records Highest priority Priority MEDIUM 2 MEDIUM, 5 LOW

    Other records, highest priority first

    • TI-2026-20355 Apache CloudStack: Proxmox Extension Allows Unauthorized Cross-Tenant Instance AccessPriority MEDIUM 48
    • TI-2025-40697 Apache CloudStack: Any user can attach a volume in their VMs from backups they should not have access toPriority LOW 38
    • TI-2025-40894 Apache CloudStack: MinIO policy remains intact on bucket deletionPriority LOW 37
    Show all 7 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-25077
  2. 2026-10-03 Alias added: GHSA-vhgc-6rjx-f6vv

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