Vulnerability Intelligence Report
Xen Orchestra before 6.9.0 Privilege Escalation via Prototype Pollution in vm.importFromEsxi
CVE-2026-110111
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.
No Active Exploit Signals
CVSS Base Score
7.7
HIGH
EPSS Probability:0.62%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-1321 ↗Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| vatesfr | xen-orchestra | 0 < 6.9.0 (affected), 6.9.0 (unaffected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.617%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | VulnCheck · Bug Bounty Provider · USA |
| Reserved | 2026-10-13T16:22:43 |
| Published | 2026-10-13T19:05:26 |
| Patch Date | 2026-09-30 |
| Last Updated | 2026-10-26T18:13:58 |
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