CVE-2026-110111

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductVatesfr Xen-orchestra

PublishedOct 13, 2026

First seenOct 13, 2026

Weakness typeCWE-1321Prototype pollution

How to fix

Update

vatesfr xen-orchestra6.9.0 or later

Vendor advisories

github.com/vatesfr/xen-orchestra/security/advisories/GHSA-mc4m-hc98-rhmv

Affected products

Product	Affected versions	Fixed in
vatesfr xen-orchestra	v < 6.9.0	6.9.0

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