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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.

以下是对该漏洞描述信息的中文翻译： 通过 Metalink 镜像 URL 解析实现的 SSRF（服务器端请求伪造）： 经过身份验证的租户可以注册一个指向由攻击者控制的 Metalink 文件的模板，其中包含内部目标。辅助存储虚拟机（Secondary Storage VM）会检索该数据并将其持久化为模板文件，随后该文件可通过正常的 API 进行下载。 通过 NFS、Metalink 文件（支持或不支持直接下载）在 KVM hypervisor 上实现远程代码执行（RCE）： 拥有默认用户角色的经过身份验证的 Clo

AI Predicted 9.8 Difficulty: Easy EPSS 0.32% · P24

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

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

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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