{"id":"CVE-2026-55227","aliases":["EUVD-2026-66712","GHSA-2p9g-x3cv-5hh4","PYSEC-2026-3941"],"status":"published","title":"Observable object existence disclosure in private Weblate projects via globally scoped object lookups","description":"Weblate is a web-based localization tool. In versions prior to 2026.7, several endpoints look up objects in a globally scoped manner rather than restricting the lookup to projects the user can access, so they return HTTP 403 (Forbidden) instead of 404 (Not Found) when a user requests an object they are not authorized to see. This difference lets unauthorized users infer whether a given object exists in a private Weblate project. The issue has been fixed in version 2026.7.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00324,"percentile":0.25638,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-203"],"published":"2026-08-26T20:10:39Z","modified":"2026-10-28T02:30:45Z","fixes":[{"ecosystem":"PyPI","package":"weblate","fixed_in":["2026.7"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"weblate","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2026.7"}]}]},{"source":"osv","ecosystem":"PyPI","package":"weblate","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2026.7"}]}],"versions":["1.9","2.0","2.1","2.10","2.10.1","2.11","2.12","2.13","2.13.1","2.14","2.14.1","2.15","2.16","2.17","2.17.1","2.18","2.19","2.19.1","2.2","2.20","2.3","2.4","2.5","2.6","2.7","2.8","2.9","2026.5","2026.6","2026.6.1","3.0","3.0.1","3.1","3.1.1","3.10","3.10.1","3.10.2","3.10.3","3.11","3.11.1","3.11.2","3.11.3","3.2","3.2.1","3.2.2","3.3","3.4","3.5","3.5.1","3.6","3.6.1","3.7","3.7.1","3.8","3.9","3.9.1","4.0","4.0.1","4.0.2","4.0.3","4.0.4","4.1","4.1.1","4.10","4.10.1","4.11","4.11.1","4.11.2","4.12","4.12.1","4.12.2","4.13","4.13.1","4.14","4.14.1","4.14.2","4.15","4.15.1","4.15.2","4.16","4.16.1","4.16.2","4.16.3","4.16.4","4.17","4.18","4.18.1","4.18.2","4.2","4.2.1","4.2.2","4.3","4.3.1","4.3.2","4.4","4.4.1","4.4.2","4.5","4.5.1","4.5.2","4.5.3","4.6","4.6.1","4.6.2","4.7","4.7.1","4.7.2","4.8","4.8.1","4.9","4.9.1","5.0","5.0.1","5.0.2","5.1","5.1.1","5.10","5.10.1","5.10.2","5.10.3","5.10.4","5.11","5.11.1","5.11.3","5.11.4","5.12.1","5.12.2","5.13","5.13.1","5.13.2","5.13.3","5.14","5.14.1","5.14.2","5.14.3","5.15","5.15.1","5.15.2","5.16","5.16.1","5.16.2","5.17","5.17.1","5.2","5.2.1","5.3","5.3.1","5.4","5.4.1","5.4.2","5.4.3","5.5","5.5.2","5.5.3","5.5.4","5.5.5","5.6","5.6.1","5.6.2","5.7","5.7.1","5.7.2","5.8.1","5.8.2","5.8.3","5.8.4","5.9.1","5.9.2"]},{"source":"osv","ecosystem":"PyPI","package":"weblate","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2026.7"}]}],"versions":["1.9","2.0","2.1","2.10","2.10.1","2.11","2.12","2.13","2.13.1","2.14","2.14.1","2.15","2.16","2.17","2.17.1","2.18","2.19","2.19.1","2.2","2.20","2.3","2.4","2.5","2.6","2.7","2.8","2.9","2026.5","2026.6","2026.6.1","3.0","3.0.1","3.1","3.1.1","3.10","3.10.1","3.10.2","3.10.3","3.11","3.11.1","3.11.2","3.11.3","3.2","3.2.1","3.2.2","3.3","3.4","3.5","3.5.1","3.6","3.6.1","3.7","3.7.1","3.8","3.9","3.9.1","4.0","4.0.1","4.0.2","4.0.3","4.0.4","4.1","4.1.1","4.10","4.10.1","4.11","4.11.1","4.11.2","4.12","4.12.1","4.12.2","4.13","4.13.1","4.14","4.14.1","4.14.2","4.15","4.15.1","4.15.2","4.16","4.16.1","4.16.2","4.16.3","4.16.4","4.17","4.18","4.18.1","4.18.2","4.2","4.2.1","4.2.2","4.3","4.3.1","4.3.2","4.4","4.4.1","4.4.2","4.5","4.5.1","4.5.2","4.5.3","4.6","4.6.1","4.6.2","4.7","4.7.1","4.7.2","4.8","4.8.1","4.9","4.9.1","5.0","5.0.1","5.0.2","5.1","5.1.1","5.10","5.10.1","5.10.2","5.10.3","5.10.4","5.11","5.11.1","5.11.3","5.11.4","5.12.1","5.12.2","5.13","5.13.1","5.13.2","5.13.3","5.14","5.14.1","5.14.2","5.14.3","5.15","5.15.1","5.15.2","5.16","5.16.1","5.16.2","5.17","5.17.1","5.2","5.2.1","5.3","5.3.1","5.4","5.4.1","5.4.2","5.4.3","5.5","5.5.2","5.5.3","5.5.4","5.5.5","5.6","5.6.1","5.6.2","5.7","5.7.1","5.7.2","5.8.1","5.8.2","5.8.3","5.8.4","5.9.1","5.9.2"]}],"products":[{"vendor":"weblateorg","product":"weblate"}],"references":[{"url":"https://github.com/WeblateOrg/weblate/security/advisories/GHSA-2p9g-x3cv-5hh4","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/WeblateOrg/weblate/commit/836bc082803d49d02f2831ec8339268eb66bcdae","tags":["x_refsource_MISC","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55227","tags":["advisory"]},{"url":"https://github.com/WeblateOrg/weblate/pull/19971","tags":["web"]},{"url":"https://github.com/WeblateOrg/weblate/releases/tag/weblate-2026.7","tags":["web"]},{"url":"https://github.com/advisories/GHSA-2p9g-x3cv-5hh4","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55227.json","tags":["advisory"]},{"url":"https://github.com/WeblateOrg/weblate","tags":["package"]},{"url":"https://pypi.org/project/weblate","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-55227","title":"Observable object existence disclosure in private Weblate projects via globally scoped object lookups","description":"Weblate is a web-based localization tool. In versions prior to 2026.7, several endpoints look up objects in a globally scoped manner rather than restricting the lookup to projects the user can access, so they return HTTP 403 (Forbidden) instead of 404 (Not Found) when a user requests an object they are not authorized to see. This difference lets unauthorized users infer whether a given object exists in a private Weblate project. The issue has been fixed in version 2026.7.","status":"published","published":"2026-08-26T20:10:39.333Z","modified":"2026-08-27T13:51:40.681Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:20:11.925815Z"}],"euvd":[{"id":"EUVD-2026-66712","description":"Weblate is a web-based localization tool. In versions prior to 2026.7, several endpoints look up objects in a globally scoped manner rather than restricting the lookup to projects the user can access, so they return HTTP 403 (Forbidden) instead of 404 (Not Found) when a user requests an object they are not authorized to see. This difference lets unauthorized users infer whether a given object exists in a private Weblate project. The issue has been fixed in version 2026.7.","status":"published","published":"2026-08-26T20:10:39Z","modified":"2026-08-27T13:51:40Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T18:01:28.581047Z"}],"ghsa":[{"id":"GHSA-2p9g-x3cv-5hh4","title":"Private Weblate projects vulnerable to observable object existence disclosure via globally scoped object lookups","description":"### Impact\nThe several endpoints could leak object existence information to users who had no access to it by HTTP status code 403 instead of 404.\n\n### Patches\n* https://github.com/WeblateOrg/weblate/pull/19971\n\n### References\nThanks to Yaohui Wang for reporting this via GitHub.","status":"published","published":"2026-08-28T18:46:54Z","modified":"2026-08-28T18:46:55Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:41:08.084849Z"}],"nvd":[{"id":"CVE-2026-55227","description":"Weblate is a web-based localization tool. In versions prior to 2026.7, several endpoints look up objects in a globally scoped manner rather than restricting the lookup to projects the user can access, so they return HTTP 403 (Forbidden) instead of 404 (Not Found) when a user requests an object they are not authorized to see. This difference lets unauthorized users infer whether a given object exists in a private Weblate project. The issue has been fixed in version 2026.7.","status":"published","published":"2026-08-26T21:16:38.587Z","modified":"2026-09-09T21:09:13.08Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:12:41.66469Z"}],"osv":[{"id":"CVE-2026-55227","title":"Observable object existence disclosure in private Weblate projects via globally scoped object lookups","description":"Weblate is a web-based localization tool. In versions prior to 2026.7, several endpoints look up objects in a globally scoped manner rather than restricting the lookup to projects the user can access, so they return HTTP 403 (Forbidden) instead of 404 (Not Found) when a user requests an object they are not authorized to see. This difference lets unauthorized users infer whether a given object exists in a private Weblate project. The issue has been fixed in version 2026.7.","status":"published","published":"2026-08-26T20:10:39.333Z","modified":"2026-10-28T02:30:45.735647682Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T15:45:11.22012Z"},{"id":"GHSA-2p9g-x3cv-5hh4","title":"Private Weblate projects vulnerable to observable object existence disclosure via globally scoped object lookups","description":"### Impact\nThe several endpoints could leak object existence information to users who had no access to it by HTTP status code 403 instead of 404.\n\n### Patches\n* https://github.com/WeblateOrg/weblate/pull/19971\n\n### References\nThanks to Yaohui Wang for reporting this via GitHub.","status":"published","published":"2026-08-28T18:46:54Z","modified":"2026-09-10T12:25:56.525025144Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T15:46:34.700741Z"},{"id":"PYSEC-2026-3941","title":"Private Weblate projects vulnerable to observable object existence disclosure via globally scoped object lookups","description":"### Impact\nThe several endpoints could leak object existence information to users who had no access to it by HTTP status code 403 instead of 404.\n\n### Patches\n* https://github.com/WeblateOrg/weblate/pull/19971\n\n### References\nThanks to Yaohui Wang for reporting this via GitHub.","status":"published","published":"2026-09-10T09:44:58.552741Z","modified":"2026-09-10T12:15:15.56150613Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:52:57.255153Z"}]}}