{"id":"CVE-2026-15612","aliases":["EUVD-2026-48304","GHSA-2r4j-c245-2qx7"],"status":"published","title":"LOIDC nonce validation bypass","description":"Logto bypasses OIDC nonce validation when the nonce claim is absent from the id_token, enabling replay of authentication tokens and weakening session-binding.","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":"2026-11-11","score":0.00243,"percentile":0.15567,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-345"],"published":"2026-07-23T15:45:27Z","modified":"2026-10-28T02:30:40Z","products":[{"vendor":"logto","product":"logto"},{"vendor":"logto-io","product":"logto"}],"references":[{"url":"https://github.com/logto-io/logto/blob/ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8/packages/core/src/sso/OidcConnector/utils.ts#L175-L182","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15612","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-2r4j-c245-2qx7"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15612.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-15612","title":"LOIDC nonce validation bypass","description":"Logto bypasses OIDC nonce validation when the nonce claim is absent from the id_token, enabling replay of authentication tokens and weakening session-binding.","status":"published","published":"2026-07-23T15:45:27.1Z","modified":"2026-07-27T16:37:08.498Z","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-345"],"updated_at":"2026-11-02T13:47:51.033687Z"}],"euvd":[{"id":"EUVD-2026-48304","description":"Logto bypasses OIDC nonce validation when the nonce claim is absent from the id_token, enabling replay of authentication tokens and weakening session-binding.","status":"published","published":"2026-07-23T15:45:27Z","modified":"2026-07-27T16:37:08Z","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":"2026-11-02T18:02:33.886037Z"}],"ghsa":[{"id":"GHSA-2r4j-c245-2qx7","title":"Logto bypasses OIDC nonce validation when the nonce claim is absent from the id_token, enabling...","description":"Logto bypasses OIDC nonce validation when the nonce claim is absent from the id_token, enabling replay of authentication tokens and weakening session-binding.","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-345"],"updated_at":"2026-11-02T15:09:51.407039Z"}],"nvd":[{"id":"CVE-2026-15612","description":"Logto bypasses OIDC nonce validation when the nonce claim is absent from the id_token, enabling replay of authentication tokens and weakening session-binding.","status":"published","published":"2026-07-23T16:17:14.047Z","modified":"2026-07-27T17:16:34.947Z","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-345"],"updated_at":"2026-11-02T14:12:32.473901Z"}],"osv":[{"id":"CVE-2026-15612","title":"LOIDC nonce validation bypass","description":"Logto bypasses OIDC nonce validation when the nonce claim is absent from the id_token, enabling replay of authentication tokens and weakening session-binding.","status":"published","published":"2026-07-23T15:45:27.1Z","modified":"2026-10-28T02:30:40.917380541Z","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"}]}}