CVE-2026-27457 PUBLISHED

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.

• https://github.com/WeblateOrg/weblate/security/advisories/GHSA-wppc-7cq7-cgfv
• https://github.com/WeblateOrg/weblate/pull/18107
• https://github.com/WeblateOrg/weblate/pull/18164
• https://github.com/WeblateOrg/weblate/commit/3f58f9a4152bc0cbdd6eff5954f9c7bc4d9f0af9
• https://github.com/WeblateOrg/weblate/commit/7802c9b121eb407c48d4adddd4f2458fb3efef0f
• https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.16.1

• CWE-862: Missing Authorization CWE
• CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE