Medium severity · published Feb 26, 2026
CVE-2026-27457
Weblate: Missing access control for the AddonViewSet API exposes all addon configurations
4.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WE
weblate · WeblateOrg
< 5.16.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27457
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-27457
Patch
https://github.com/WeblateOrg/weblate/commit/3f58f9a4152bc0cbdd6eff5954f9c7bc4d9f0af9
Patch
https://github.com/WeblateOrg/weblate/commit/7802c9b121eb407c48d4adddd4f2458fb3efef0f
Issue Tracking
https://github.com/WeblateOrg/weblate/pull/18107
Issue Tracking
https://github.com/WeblateOrg/weblate/pull/18164
Product
https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.16.1
Patch
https://github.com/WeblateOrg/weblate/security/advisories/GHSA-wppc-7cq7-cgfv
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