{"id":"CVE-2026-15617","aliases":["EUVD-2026-48300","GHSA-257m-4vpx-xg86"],"status":"published","title":"Principal/domain lookup without case normalization","description":"Logto performs principal lookup without normalizing email and identifier strings, enabling principal collision and unauthorized account access via case- or Unicode-different identities.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.00427,"percentile":0.37411,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-178"],"published":"2026-07-23T15:41:29Z","modified":"2026-10-28T02:30:55Z","products":[{"vendor":"logto","product":"logto"},{"vendor":"logto-io","product":"logto"}],"references":[{"url":"https://github.com/logto-io/logto/blob/ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8/packages/core/src/libraries/verification-helpers/single-sign-on-guard.ts#L23-L33","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15617","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-257m-4vpx-xg86"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15617.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-15617","title":"Principal/domain lookup without case normalization","description":"Logto performs principal lookup without normalizing email and identifier strings, enabling principal collision and unauthorized account access via case- or Unicode-different identities.","status":"published","published":"2026-07-23T15:41:29.123Z","modified":"2026-07-27T15:33:20.686Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp"}],"cwes":["CWE-178"],"updated_at":"2026-11-02T13:47:51.033687Z"}],"euvd":[{"id":"EUVD-2026-48300","description":"Logto performs principal lookup without normalizing email and identifier strings, enabling principal collision and unauthorized account access via case- or Unicode-different identities.","status":"published","published":"2026-07-23T15:41:29Z","modified":"2026-07-27T15:33:20Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T18:02:34.216106Z"}],"ghsa":[{"id":"GHSA-257m-4vpx-xg86","title":"Logto performs principal lookup without normalizing email and identifier strings, enabling...","description":"Logto performs principal lookup without normalizing email and identifier strings, enabling principal collision and unauthorized account access via case- or Unicode-different identities.","status":"published","published":"2026-07-23T18:31:44Z","modified":"2026-07-27T18:31:42Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-178"],"updated_at":"2026-11-02T15:09:51.407039Z"}],"nvd":[{"id":"CVE-2026-15617","description":"Logto performs principal lookup without normalizing email and identifier strings, enabling principal collision and unauthorized account access via case- or Unicode-different identities.","status":"published","published":"2026-07-23T16:17:14.423Z","modified":"2026-07-27T16:17:03.047Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"}],"cwes":["CWE-178"],"updated_at":"2026-11-02T14:12:32.473901Z"}],"osv":[{"id":"CVE-2026-15617","title":"Principal/domain lookup without case normalization","description":"Logto performs principal lookup without normalizing email and identifier strings, enabling principal collision and unauthorized account access via case- or Unicode-different identities.","status":"published","published":"2026-07-23T15:41:29.123Z","modified":"2026-10-28T02:30:55.344580596Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:44:57.682091Z"}]}}