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CVE-2026-110111— Xen Orchestra before 6.9.0 Privilege Escalation via Prototype Pollution in vm.importFromEsxi

Quick assessment

Affected
vatesfr xen-orchestra
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Xen Orchestra 6.9.0 版本之前，存在一个不正确的访问控制漏洞。该漏洞允许任何经过身份验证的用户通过滥用未受保护的 和 方法，将自身提升为全局管理员。攻击者可以通过将 xo-server 指向一个提供伪造 文件的恶意 ESXi 主机来利用此漏洞，该 文件中设置了 ，从而污染 ，使得无需权限的用户也能继承管理员权限，并进一步实现远程代码执行。

CVSS 7.5 · High EPSS 0.62% · P48

Affected Version Matrix 2

VendorProduct Version RangeStatus
vatesfr xen-orchestra < 6.9.0 affected
6.9.0 unaffected
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I. Basic Information for CVE-2026-110111

Vulnerability Information
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Vulnerability Title
Xen Orchestra before 6.9.0 Privilege Escalation via Prototype Pollution in vm.importFromEsxi
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vatesfr xen-orchestra 0 ~ 6.9.0 -

II. Public POCs for CVE-2026-110111

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III. Intelligence Information for CVE-2026-110111

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Other References for CVE-2026-110111 (2)

IV. Related Vulnerabilities

Same weakness: CWE-1321

V. Comments for CVE-2026-110111

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