{"id":"CVE-2026-15611","aliases":["EUVD-2026-48305","GHSA-26cp-25m8-5fgc"],"status":"published","title":"Unverified email-based SSO account linking","description":"Logto allows unverified email-based SSO account linking, enabling an attacker to register an identity at a permissive IdP using a victim’s email and gain unauthorized access to the victim’s account.","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":0.00482,"percentile":0.42062,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2026-07-23T15:45:48Z","modified":"2026-10-28T02:30:28Z","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.ts#L274","tags":["web"]},{"url":"https://github.com/logto-io/logto/blob/ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8/packages/core/src/routes/experience/classes/verifications/enterprise-sso-verification.ts#L284-L297","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15611","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-26cp-25m8-5fgc"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15611.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-15611","title":"Unverified email-based SSO account linking","description":"Logto allows unverified email-based SSO account linking, enabling an attacker to register an identity at a permissive IdP using a victim’s email and gain unauthorized access to the victim’s account.","status":"published","published":"2026-07-23T15:45:48.25Z","modified":"2026-07-27T16:32:47.244Z","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-287"],"updated_at":"2026-11-02T13:47:51.033687Z"}],"euvd":[{"id":"EUVD-2026-48305","description":"Logto allows unverified email-based SSO account linking, enabling an attacker to register an identity at a permissive IdP using a victim’s email and gain unauthorized access to the victim’s account.","status":"published","published":"2026-07-23T15:45:48Z","modified":"2026-07-27T16:32:47Z","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-26cp-25m8-5fgc","title":"Logto allows unverified email-based SSO account linking, enabling an attacker to register an...","description":"Logto allows unverified email-based SSO account linking, enabling an attacker to register an identity at a permissive IdP using a victim’s email and gain unauthorized access to the victim’s account.","status":"published","published":"2026-07-23T18:31:44Z","modified":"2026-07-27T18:32:47Z","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-287"],"updated_at":"2026-11-02T15:09:51.407039Z"}],"nvd":[{"id":"CVE-2026-15611","description":"Logto allows unverified email-based SSO account linking, enabling an attacker to register an identity at a permissive IdP using a victim’s email and gain unauthorized access to the victim’s account.","status":"published","published":"2026-07-23T16:17:13.947Z","modified":"2026-07-27T17:16:34.8Z","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-287"],"updated_at":"2026-11-02T14:12:32.473901Z"}],"osv":[{"id":"CVE-2026-15611","title":"Unverified email-based SSO account linking","description":"Logto allows unverified email-based SSO account linking, enabling an attacker to register an identity at a permissive IdP using a victim’s email and gain unauthorized access to the victim’s account.","status":"published","published":"2026-07-23T15:45:48.25Z","modified":"2026-10-28T02:30:28.225280643Z","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"}]}}