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CVE-2026-110111high7.7

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

Impact

Xen Orchestra before 6.9.0 has a privilege escalation vulnerability via prototype pollution, allowing authenticated users to become global administrators. Attackers can exploit this by pointing the server at a malicious ESXi host with a crafted .vmx file. The impact is elevation of privileges.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

vatesfr · VulnCheck

xen-orchestra

2 ranges
VulnCheck version evidence

Package identity

pkg:github/vatesfr/xen-orchestra

Identity supplied by VulnCheck. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 6.9.0

semver versions

unaffected

6.9.0

semver versions

unknown

Other versions: unaffected

Original source 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.

Inside the record

Evidence available

Package identity
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-110111

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-1321 ↗

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

VulnCheck

Related →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

VulnCheck · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:a:xen-orchestra:xen_orchestra_server:*:*:*:*:*:*:*:*

Before: 6.9.0

Original applicability statements
[
  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:xen-orchestra:xen_orchestra_server:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "6.9.0"
          }
        ]
      }
    ]
  }
]
Contributing organizations · 2
VulnCheck

Assigning organization

2026-10-13
CISA-ADP

Additional data publisher

2026-10-26

What changed

Follow changes
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.

References

2 sources
github.com/vatesfr/xen-orchestra/security/advisories/GHSA-mc4m-hc98-rhmv
vendor-advisoryVulnCheck
www.vulncheck.com/advisories/xen-orchestra-before-6.9.0-privilege-escalation-via-prototype-pollution-in-vm-importfromesxi
third-party-advisoryVulnCheck