---
id: "CVE-2026-122224"
kind: "vulnerability"
aliases: ["CVE-2026-122224"]
title: "WebVirtCloud: missing authorization lets low-privileged users migrate others' virtual machines"
severity: "high"
cvss: 8.1
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "webvirtcloud", "fixed": [], "affected": "<= commit bb920b0a7ffdf00c09e994dc2e45f05bc9ec1bb3", "ecosystem": "github"}]
ecosystems: []
tags: ["kvm", "other", "self-hosted", "virtualization", "webvirtcloud"]
not_affected_if: ["admin-only-users", "no-network-access", "no-untrusted-accounts", "single-user-install"]
published_at: "2026-11-04T21:18:10+00:00"
first_seen_at: "2026-11-04T21:49:21+00:00"
updated_at: "2026-11-04T21:53:22+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-122224", "first_seen_at": "2026-11-04T21:49:21+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-11-04T21:53:22+00:00"}]
exploit_sources: []
---

# WebVirtCloud: missing authorization lets low-privileged users migrate others' virtual machines

WebVirtCloud, a web panel for managing KVM virtual machines, does not declare permission checks on its migrate and instance-create API endpoints, so Django REST Framework allows any logged-in user through. An authenticated low-privileged user can migrate or undefine other users' virtual machines and create volumes and domains on any compute host.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- github:webvirtcloud affected <= commit bb920b0a7ffdf00c09e994dc2e45f05bc9ec1bb3 fixed ?

## How to check

Check whether your WebVirtCloud code is at or before commit bb920b0 (retspen/webvirtcloud). In instances/api/viewsets.py, look at MigrateViewSet and CreateInstanceViewSet: if neither declares permission_classes, any logged-in user can call /api/v1/migrate/ and the instance-create endpoint. Also check whether non-admin accounts exist on the panel.

## Fix

No release yet. Commit 1227674 in the catborise/webvirtcloud fork sets permission_classes = [IsAdminUser] on MigrateViewSet and CreateInstanceViewSet (and other API viewsets); per the maintainer comment on upstream issue #689 it is not merged into retspen/webvirtcloud yet. Until then, apply that commit or add IsAdminUser to those viewsets.

## Timeline

- 2026-11-04T21:49:21+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-122224
- 2026-11-04T21:53:22+00:00 analyst — Read VulnCheck advisory, fix commit 1227674 (catborise fork) and upstream issue 689. Fix is a commit on a fork, not merged upstream per maintainer comment 2026-11-04; no release version.

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/webvirtcloud-through-commit-bb920b0-missing-authorization-in-rest-api-migrate-and-create-endpoints
- [discussion] retspen/webvirtcloud issue 689 https://github.com/retspen/webvirtcloud/issues/689
- [fix] catborise/webvirtcloud commit 1227674: restrict API to IsAdminUser https://github.com/catborise/webvirtcloud/commit/1227674d8f5a5230e5c654267773aca4ebc5c717

## From the sources

WebVirtCloud through commit bb920b0 contains a missing authorization vulnerability that allows low-privileged authenticated users to reach MigrateViewSet and CreateInstanceViewSet because no permission_classes are declared, so Django REST Framework defaults to AllowAny. Attackers can send requests to /api/v1/migrate/ or the compute instance create endpoint to migrate or undefine other users' virtual machines and create volumes and domains on any compute host.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_