CVE-2026-27457 Weblate: Missing access control for the AddonViewSet API exposes all addon configurations
Authenticated users can access all addon configurations across projects due to missing permission checks in the API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-27457?
CVE-2026-27457 is a medium-severity missing authorization vulnerability in WeblateOrg weblate, published on 26 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-27457?
3 open source packages ship an affected version, including weblate. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
weblate PyPI | All versions | 5.16.1 |
weblate PyPI | All versions | 5.16.1 |
weblate PyPI | All versions | 5.16.1 |
Linux distribution packages (1)
weblate openSUSE:Tumbleweed | All versions | 5.16.1-1.1 |
Products include Weblate Weblate.
How do I fix CVE-2026-27457?
Upgrade weblate to 5.16.1 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-27457 being exploited?
There is no known exploitation of CVE-2026-27457 in the wild and no public exploit code.
Other vulnerabilities in WeblateOrg weblate
- CVE-2025-68398 Weblate has git config file overwrite vulnerability that leads to remote code execution
- CVE-2026-34393 Weblate: Privilege escalation in the user API endpoint
- CVE-2026-33435 Weblate: Remote code execution during backup restoration
- CVE-2026-34242 Weblate: Arbitrary File Read via Symlink
- CVE-2025-68279 Weblate has an arbitrary file read via symbolic links
Sources
Also known as GHSA-wppc-7cq7-cgfv, PYSEC-2026-2310, openSUSE-SU-2026:10309-1.