{"id":"CVE-2026-53947","aliases":["BIT-ghost-2026-53947","GHSA-chgm-3698-jm42"],"url":"https://o3.security/vulnerability/CVE-2026-53947","summary":"Ghost: Member existence leak via magic link sign-in response","details":"Ghost is a Node.js content management system. From 5.18.0 until 6.21.1, a discrepancy in responses from the members signin endpoints made it possible for an unauthenticated attacker to determine whether a given email address belongs to a registered member of a Ghost site. This vulnerability is fixed in 6.21.1.","published":"2026-06-24T18:07:42.965Z","modified":"2026-08-12T03:51:43.254814295Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"ghost","fixedVersion":"6.21.2"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53947.json"},{"type":"ADVISORY","url":"https://github.com/TryGhost/Ghost/security/advisories/GHSA-chgm-3698-jm42"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53947"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:43.254814295Z"}}