CVE-2026-50112Network attack vector

Cross-tenant root execution and SSRF via metalink URLs

Published Aug 21, 2026 · Updated Aug 21, 2026

Command injection and SSRF in Apache CloudStack allow remote authenticated users to execute root commands on KVM hosts and reach internal URLs. Template registration accepts attacker-controlled metalink files, then dispatches their inner URLs to KVM agents without reapplying the scheme allowlist, enabling NFS and metalink values to reach shell execution paths. The default User role and public API are sufficient; affected releases are 4.14.0.0 through 4.20.3.0 and 4.21.0.0 through 4.22.1.0, and compromise runs as root across tenant boundaries.

CVSS severity8.8
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection and SSRF in Apache CloudStack allow remote authenticated users to execute root commands on KVM hosts and reach internal URLs. Template registration accepts attacker-controlled metalink files, then dispatches their inner URLs to KVM agents without reapplying the scheme allowlist, enabling NFS and metalink values to reach shell execution paths. The default User role and public API are sufficient; affected releases are 4.14.0.0 through 4.20.3.0 and 4.21.0.0 through 4.22.1.0, and compromise runs as root across tenant boundaries.

The record

CVE
CVE-2026-50112
Published
Aug 21, 2026
Updated
Aug 21, 2026
Vendor
The Apache Software Foundation
Product
Apache CloudStack
Classifications
CWE-918, CWE-78, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.14.0.0 <=4.20.3.0
  2. Affected versionversion=4.21.0.0 <=4.22.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache CloudStackversion=4.14.0.0 <=4.20.3.0; version=4.21.0.0 <=4.22.1.0

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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