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CVE-2026-23561 is an authorization flaw in XAPI role-based access control in which a user with the lower-privileged vm-admin role can set the VM.other_config:storage_driver_domain field, an operation that should be restricted to a more privileged administrator role. By assigning a VM as the storage driver domain for a particular host storage connection (PBD), the attacker can alter how XAPI tracks that storage relationship. If the marked VM is then shut down, the associated PBD can be incorrectly recorded as unplugged even though it remains connected. The issue stems from inadequate restriction of sensitive configuration settings within XAPI RBAC.
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14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Critical privilege-escalation vulnerability in XAPI for XCP-ng/Citrix XenServer allowing escalation from RBAC-restricted roles to root on the hypervisor control domain.
Privilege/authorization weakness in XAPI RBAC allowing a vm-admin to designate a VM as a storage driver domain for a host storage connection, leading to incorrect PBD unplugged state when the VM is shut down.
An RBAC restriction flaw in XAPI/XenServer that lets a vm-admin designate a VM as the storage driver domain for a host storage connection, leading to incorrect PBD state handling when the VM is shut down.
Privilege/authorization weakness in XAPI RBAC allowing a vm-admin to designate a VM as a storage driver domain for a host storage connection, leading to incorrect PBD unplugged state when the VM is shut down.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.