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Vulnerability · Published Feb 26, 2026 · Assigned by GitHub_M

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

Medium 4.3

In plain English

A medium-severity missing authorization in weblate from WeblateOrg. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.3%top 71.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPIweblate5.16.1GHSA-wppc-7cq7-cgfv
PyPIweblate5.16.1PYSEC-2026-2310

Affected products (as reported)

VendorProductVersions
WeblateOrg weblate < 5.16.1

Weakness: CWE-862, CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References