Weblate: Missing access control for the AddonViewSet API exposes all addon configurations
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure, Security bypass
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200 and CWE-862.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| WeblateOrg | weblate | before 5.16.1 | 5.16.1 | Patch available | CNA |
| — | weblate (PyPI) | before 5.16.1 | 5.16.1 | Patch available | GHSA-wppc-7cq7-cgfv |
- weblate VendorWeblateOrg Affected before 5.16.1 Fixed in 5.16.1 Patch available CNA
- weblate (PyPI) Vendor— Affected before 5.16.1 Fixed in 5.16.1 Patch available GHSA-wppc-7cq7-cgfv
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:weblate:weblate:*:*:*:*:*:*:*:* | before 5.16.1 | Vulnerable | WeblateOrg |
- cpe:2.3:a:weblate:weblate:*:*:*:*:*:*:*:* Versions before 5.16.1 Vulnerable ·WeblateOrg
Remediation
- Fix · CNA weblate (WeblateOrg) Fixed in 5.16.1
- Fix · GHSA-wppc-7cq7-cgfv weblate (PyPI) Fixed in 5.16.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-27457
- 2026-10-03 Alias added: GHSA-wppc-7cq7-cgfv
References
Patch 5
- 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
More WeblateOrg Weblate vulnerabilities
- TI-2025-23145 Weblate VCS credentials included in URL parameters are potentially logged and saved into browser history as plaintext CVSS 3.1HIGH 7.5
- TI-2025-38033 Weblate integration with Anubis can lead to Open Redirect via redir parameter CVSS 4.0LOW 2.1
- TI-2022-07893 Remote code execution (RCE) in Weblate CVSS 3.1HIGH 8.8
- TI-2025-41967 Weblate has git config file overwrite vulnerability that leads to remote code execution CVSS 3.1CRITICAL 9.1
- TI-2026-26679 Weblate: Privilege escalation in the user API endpoint CVSS 3.1HIGH 8.8
- TI-2026-19444 Weblate has an argument injection in management console CVSS 3.1CRITICAL 9.1
Sources
- CVE-2026-27457 · CVE Program
- CVE-2026-27457 · NVD
- FIRST EPSS
- GHSA-wppc-7cq7-cgfv · GitHub Advisory Database · CC BY 4.0
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