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    CVE-2026-61399

    Improper Encoding or Escaping of Output vulnerability in Apache CloudStack's UI while using Lock User Functionality. This issue affects Apache CloudStack: from 4.20.0.0 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.

    Published:Aug 21, 2026
    Last Modified:Aug 27, 2026
    EPS:Aug 21, 2026
    EPSS Score:0.00143
    CVSS Score:4.8

    Affected Products

    Vendor
    Apache
    Product
    Apache Cloudstack
    Vendor
    Apache
    Product
    Cloudstack

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-59780 (CVSS 7.5) — Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache CloudStack's LDAP authentic…
    CVE-2026-61397 (CVSS 7.5) — Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache CloudStack's OAuth2 authent…
    CVE-2026-62440 (CVSS 9.1) — Improper Access Control vulnerability in Apache CloudStack's Kubernetes Service (CKS) plugin, allowing cross-t…
    CVE-2026-66721 (CVSS 2.7) — Missing authorization issue for domain admins in CloudStack's host tags listing functionality. Domain Admi…
    CVE-2026-66797 (CVSS 5.4) — Improper access control in CloudStack's annotation functionality allows unauthorized comment creation and disc…
    CVE-2025-26521 (CVSS 8.1) — When an Apache CloudStack user-account creates a CKS-based Kubernetes cluster in a project, the API key and th…
    CVE-2025-47849 (CVSS 8.8) — A privilege escalation vulnerability exists in Apache CloudStack versions 4.10.0.0 through 4.20.0.0 where a ma…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High