CVE-2026-27457 MEDIUM

CVE-2026-27457: Weblate: Missing access control for the AddonViewSet API exposes all addon configurations

Vendor Weblateorg
Product weblate
Weakness CWE-862 · Missing authorization
Published February 26, 2026
Last update March 3, 2026
View on NVD All CVEs

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

Weblate is a web based localization tool. Prior to version 5.16.1, the REST API's `AddonViewSet` (`weblate/api/views.py`, line 2831) uses `queryset = Addon.objects.all()` without overriding `get_queryset()` to scope results by user permissions. This allows any authenticated user (or anonymous users if `REQUIRE_LOGIN` is not set) to list and retrieve ALL addons across all projects and components via `GET /api/addons/` and `GET /api/addons/{id}/`. Version 5.16.1 fixes the issue.

Key dates

02Disclosure timeline

February 26, 2026 CVE published
March 3, 2026 Record updated