---
id: CVE-2026-113610
title: Xen Orchestra before 6.9.0 Authorization Bypass via user.set API
summary: >-
  Xen Orchestra before 6.9.0 contains an authorization bypass vulnerability in
  the xo-server user.set API method that allows low-privileged authenticated
  users to modify other users' preferences by supplying an arbitrary target user
  id. At…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-639
vendor: vatesfr
product: xen-orchestra
affected:
  - xen-orchestra < 6.9.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-20T18:19:42.474708Z'
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T18:19:50.195Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-113610'
references:
  - url: >-
      https://github.com/vatesfr/xen-orchestra/security/advisories/GHSA-mc4m-hc98-rhmv
    label: GitHub Security Advisory (GHSA-mc4m-hc98-rhmv)
  - url: >-
      https://github.com/vatesfr/xen-orchestra/commit/3dbf8738f1e682b96ade2074dc84bee02a0c2d48
  - url: >-
      https://github.com/vatesfr/xen-orchestra/blob/f187b7931988e3e5c9ccd58abe730d6b006cc246/packages/xo-server/src/api/user.mjs#L73-L93
  - url: >-
      https://www.vulncheck.com/advisories/xen-orchestra-before-6.9.0-authorization-bypass-via-user-set-api
    label: >-
      VulnCheck Advisory: Xen Orchestra before 6.9.0 Authorization Bypass via
      user.set API
tags:
  - cve.org
ingestedAt: '2026-10-20T16:10:53.300Z'
---

## Overview

Xen Orchestra before 6.9.0 contains an authorization bypass vulnerability in the xo-server user.set API method that allows low-privileged authenticated users to modify other users' preferences by supplying an arbitrary target user id. Attackers can delete the preferences.otp TOTP secret to disable two-factor authentication, corrupt it to block logins, or overwrite stored xsCredentials and sshKeys.

## Affected

- `xen-orchestra < 6.9.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.