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CVE-2026-50112— Apache CloudStack: RCE and SSRF in direct download, metalink and NFS templates

Quick assessment

Affected
Apache Software Foundation Apache CloudStack
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache cloudstack是美国Apache基金会开源的一套云计算管理平台。 Apache CloudStack 4.14.0.0版本至4.20.3.0版本和4.21.0.0版本至4.22.1.0版本存在安全漏洞，该漏洞源于Metalink文件中内部URL未经过重新验证且存在命令注入问题，可能导致服务端请求伪造和远程代码执行。

AI Predicted 9.8 Difficulty: Easy EPSS 0.72% · P53

Affected Version Matrix 2

VendorProduct Version RangeStatus
Apache Software Foundation Apache CloudStack 4.14.0.0≤ 4.20.3.0 affected
4.21.0.0≤ 4.22.1.0 affected
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I. Basic Information for CVE-2026-50112

Vulnerability Information
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Vulnerability Title
Apache CloudStack: RCE and SSRF in direct download, metalink and NFS templates
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache CloudStack 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache cloudstack是美国Apache基金会开源的一套云计算管理平台。 Apache CloudStack 4.14.0.0版本至4.20.3.0版本和4.21.0.0版本至4.22.1.0版本存在安全漏洞，该漏洞源于Metalink文件中内部URL未经过重新验证且存在命令注入问题，可能导致服务端请求伪造和远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache CloudStack 4.14.0.0 ~ 4.20.3.0 -

II. Public POCs for CVE-2026-50112

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III. Intelligence Information for CVE-2026-50112

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Mailing List Discussions for CVE-2026-50112 (1)

Same Patch Batch · Apache Software Foundation · 2026-08-21 · 21 CVEs total

CVE-2026-59654 6.8 MEDIUM Apache CloudStack: DoS caused by database connections leak
CVE-2026-61397 Apache CloudStack: OAuth2 Token Cross-Request Leak
CVE-2026-63046 Apache InLong: Agent Installer — Command Injection to RCE via Default Credentials
CVE-2026-47359 Apache CloudStack: OS Command Injection due to unsanitized mount command
CVE-2026-50222 Apache CloudStack: Improper access control in Userdata reference APIs
CVE-2026-59085 Apache CloudStack: Server-Side Request Forgery (SSRF) vulnerability in webhook module
CVE-2026-59655 Apache CloudStack: Unauthenticated OAuth provider client-secret disclosure
CVE-2026-59657 Apache CloudStack: Sensitive Information Disclosure via Cleartext Storage in AsyncJob
CVE-2026-59780 Apache CloudStack: LDAP provider configuration disclosure
CVE-2026-59799 Apache CloudStack: Missing Privilege Check in Two-Factor Authentication Disable Flow
CVE-2026-68745 Apache CloudStack: SAML2 Signature Validation Silently Skipped for Cert-less IdP
CVE-2026-61398 Apache CloudStack: Cross-Site Scripting (XSS) Vulnerability in Instance Reset Password Fun
CVE-2026-61399 Apache CloudStack: Cross-Site Scripting (XSS) Vulnerability in Lock User Function in UI
CVE-2026-61400 Apache CloudStack: Get and Run Diagnostics Command Injection
CVE-2026-61422 Apache CloudStack: Authenticated pre-validation SSRF in registerTemplate
CVE-2026-62440 Apache CloudStack: Improper access control in Kubernetes Service (CKS) cluster manipulatio
CVE-2026-65613 Apache CloudStack: Webhook Deliveries Incorrect Access
CVE-2026-66721 Apache CloudStack: Authorization issue with listHostTags for domain admins
CVE-2026-66722 Apache CloudStack: ProjectRole & ProjectRolePermission authorization issue
CVE-2026-66797 Apache CloudStack: Unauthorised comment creation and disclosure

IV. Related Vulnerabilities

Same product: Apache CloudStack
Same vendor: Apache Software Foundation
Same weakness: CWE-78

V. Comments for CVE-2026-50112

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