CVE-2026-110111

Xen Orchestra before 6.9.0 Privilege Escalation via Prototype Pollution in vm.importFromEsxi

Published Oct 13, 2026 CVSS 4.0 · 7.7 High EPSS < 1% KEV · Not listed
Description
Xen Orchestra before 6.9.0 contains an improper access control vulnerability that allows any authenticated user to become global administrator by abusing the unprotected vm.importFromEsxi and vm.importMultipleFromEsxi methods. Attackers can point xo-server at a malicious ESXi host serving a crafted .vmx file with __proto__.permission set, polluting Object.prototype so permission-less accounts inherit admin rights and enabling remote code execution.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Vatesfr
Vatesfr xen-orchestra
Vendors & Products Vatesfr
Vatesfr xen-orchestra
Type Values Removed Values Added
Description Xen Orchestra before 6.9.0 contains an improper access control vulnerability that allows any authenticated user to become global administrator by abusing the unprotected vm.importFromEsxi and vm.importMultipleFromEsxi methods. Attackers can point xo-server at a malicious ESXi host serving a crafted .vmx file with __proto__.permission set, polluting Object.prototype so permission-less accounts inherit admin rights and enabling remote code execution.
Title Xen Orchestra before 6.9.0 Privilege Escalation via Prototype Pollution in vm.importFromEsxi
First Time appeared Xen-orchestra
Xen-orchestra xen Orchestra Server
Weaknesses CWE-1321
CPEs cpe:2.3:a:xen-orchestra:xen_orchestra_server:*:*:*:*:*:*:*:*
Vendors & Products Xen-orchestra
Xen-orchestra xen Orchestra Server
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.7, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 26, 2026, 6:13 PM
Reserved
Oct 13, 2026, 4:22 PM
Status
Awaiting Analysis
Published
Oct 13, 2026, 7:18 PM
Modified
Oct 26, 2026, 7:16 PM