CVE-2026-110111 Xen Orchestra before 6.9.0 Privilege Escalation via Prototype Pollution in vm.importFromEsxi
Authenticated users can escalate to global administrator and execute code via prototype pollution in Xen Orchestra's ESXi import methods.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-110111?
CVE-2026-110111 is a high-severity vulnerability in vatesfr xen-orchestra, published on 13 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-1321
Which versions are affected by CVE-2026-110111?
How do I fix CVE-2026-110111?
No fix has been published for CVE-2026-110111 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-110111 being exploited?
There is no known exploitation of CVE-2026-110111 in the wild and no public exploit code.
Sources
Also known as GHSA-9p53-2254-x397, UBUNTU-CVE-2026-110111.