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Weblate: Missing access control for the AddonViewSet API exposes all addon configurations

Type: advisorySources: OSV

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.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-27457
Confirmed fixed CVEs
Not specified
Updated in this feed
6 Nov 2026, 18:59 UTC · Revision 1

Source evidence

Weblate: Missing access control for the AddonViewSet API exposes all addon configurations

core-osv · Original source

Published 26 Feb 2026, 21:56 UTC

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.

osv:CVE-2026-27457
Complete source record
{
  "id": "370931c8d4e9974a6c40e428429efa7d31913fcea9fbdfecde6acc9e87db4295",
  "url": "https://osv.dev/vulnerability/CVE-2026-27457",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Weblate: Missing access control for the AddonViewSet API exposes all addon configurations",
    "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.",
    "evidence": "osv:CVE-2026-27457",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-27457",
      "aliases": [
        "CVE-2026-27457",
        "GHSA-wppc-7cq7-cgfv",
        "PYSEC-2026-2310"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/weblateorg/weblate",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "562af580d410d5a3646d807785ba56e77430fa9a"
                },
                {
                  "fixed": "3f58f9a4152bc0cbdd6eff5954f9c7bc4d9f0af9"
                },
                {
                  "fixed": "7802c9b121eb407c48d4adddd4f2458fb3efef0f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:weblate:weblate:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "5.16.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3f58f9a4152bc0cbdd6eff5954f9c7bc4d9f0af9"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "7802c9b121eb407c48d4adddd4f2458fb3efef0f"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "562af580d410d5a3646d807785ba56e77430fa9a"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "weblate-5.16.1"
                  }
                ]
              }
            }
          ],
          "versions": [
            "weblate-5.16",
            "weblate-5.15.2",
            "weblate-5.15.1",
            "weblate-5.15",
            "weblate-5.14.1",
            "weblate-5.14",
            "weblate-5.13.2",
            "weblate-5.13.1",
            "weblate-5.13",
            "weblate-5.12.2",
            "weblate-5.12.1",
            "weblate-5.12",
            "weblate-5.11.1",
            "weblate-5.11",
            "weblate-5.10.3",
            "weblate-5.10.2",
            "weblate-5.10.1",
            "weblate-5.10",
            "weblate-5.9.2",
            "weblate-5.9.1",
            "weblate-5.9",
            "weblate-5.8.2",
            "weblate-5.8.1",
            "weblate-5.8",
            "weblate-5.7.2",
            "weblate-5.7.1",
            "weblate-5.7",
            "weblate-5.6.1",
            "weblate-5.6",
            "weblate-5.5.5",
            "weblate-5.5.4",
            "weblate-5.5.3",
            "weblate-5.5.2",
            "weblate-5.5.1",
            "weblate-5.5",
            "weblate-5.4",
            "weblate-5.3",
            "weblate-5.2.1",
            "weblate-5.2",
            "weblate-5.1.1",
            "weblate-5.1",
            "weblate-5.0.2",
            "weblate-5.0.1",
            "weblate-4.18.1",
            "weblate-4.18",
            "weblate-4.17",
            "weblate-4.16.2",
            "weblate-4.16.1",
            "weblate-4.16",
            "weblate-4.15.1",
            "weblate-4.15",
            "weblate-4.14.2",
            "weblate-4.14.1",
            "weblate-4.14",
            "weblate-4.13.1",
            "weblate-4.13",
            "weblate-4.12.1",
            "weblate-4.12",
            "weblate-4.11.2",
            "weblate-4.11.1",
            "weblate-4.11",
            "weblate-4.10.1",
            "weblate-4.10",
            "weblate-4.9.1",
            "weblate-4.9",
            "weblate-4.8.1",
            "weblate-4.8",
            "weblate-4.7.2",
            "weblate-4.7.1",
            "weblate-4.7",
            "weblate-4.6",
            "weblate-4.5.2",
            "weblate-4.5.1",
            "weblate-4.5",
            "weblate-4.4.1",
            "weblate-4.4",
            "weblate-4.3.2",
            "weblate-4.3.1",
            "weblate-4.3",
            "weblate-4.2.1",
            "weblate-4.2",
            "weblate-4.1.1",
            "weblate-4.1",
            "weblate-4.0.2",
            "weblate-4.0.1",
            "weblate-4.0",
            "weblate-3.11.1",
            "weblate-3.11",
            "weblate-3.10.2",
            "weblate-3.10.1",
            "weblate-3.10",
            "weblate-3.9.1",
            "weblate-3.9",
            "weblate-3.8",
            "weblate-3.7.1",
            "weblate-3.7",
            "weblate-3.6.1",
            "weblate-3.6",
            "weblate-3.5.1",
            "weblate-3.5",
            "weblate-3.4",
            "weblate-3.3",
            "weblate-3.2.1",
            "weblate-3.2",
            "weblate-3.1.1",
            "weblate-3.1",
            "weblate-3.0.1",
            "weblate-3.0",
            "weblate-2.20",
            "weblate-2.19.1",
            "weblate-2.19",
            "weblate-2.18",
            "weblate-2.17",
            "weblate-2.16",
            "weblate-2.15",
            "weblate-2.14.1",
            "weblate-2.14",
            "weblate-2.13.1",
            "weblate-2.13",
            "weblate-2.12",
            "weblate-2.11",
            "weblate-2.10",
            "weblate-2.9",
            "weblate-2.8",
            "weblate-2.7",
            "weblate-2.5",
            "weblate-2.4",
            "weblate-2.3",
            "weblate-2.2",
            "weblate-2.1",
            "weblate-1.9",
            "weblate-1.8",
            "weblate-1.7",
            "weblate-1.6",
            "weblate-1.5",
            "weblate-1.4",
            "weblate-1.3",
            "weblate-1.2",
            "weblate-1.1",
            "weblate-1.0",
            "weblate-0.9",
            "weblate-0.8",
            "weblate-0.6",
            "weblate-0.5",
            "weblate-0.3",
            "weblate-0.2",
            "weblate-0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27457.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.120550050Z",
      "provider": "osv",
      "references": [
        "https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.16.1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27457.json",
        "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-wppc-7cq7-cgfv",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-27457",
        "https://github.com/WeblateOrg/weblate/commit/3f58f9a4152bc0cbdd6eff5954f9c7bc4d9f0af9",
        "https://github.com/WeblateOrg/weblate/commit/7802c9b121eb407c48d4adddd4f2458fb3efef0f",
        "https://github.com/WeblateOrg/weblate/pull/18107",
        "https://github.com/WeblateOrg/weblate/pull/18164"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200",
          "CWE-862"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27457.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-27457",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 515930,
  "published_at": "2026-02-26T21:56:03.22+00:00"
}