{"id":"GHSA-chgm-3698-jm42","revision":"48e15964864444ada5df2bc108b26a12","records":[{"revision":"48e15964864444ada5df2bc108b26a12","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-chgm-3698-jm42","aliases":["BIT-ghost-2026-53947","CVE-2026-53947"],"title":"Ghost: Member existence leak via magic link sign-in response","description":"### Impact\n\nA 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.\n\n### Vulnerable versions\n\nThis vulnerability is present in Ghost from v5.18.0 up to v6.21.0.\n\n### Patches\n\nv6.21.1 contains a fix for this issue.\n\n### How to update\n\nFor self-hosters using Docker, find [Docker's official Ghost image here](https://hub.docker.com/_/ghost). Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost). \n\nIf your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update). \n\n### For more information\n\nIf you have any questions or comments about this advisory, email Ghost at [security@ghost.org](mailto:security@ghost.org).","state":0,"publishedAt":"2026-08-04T21:56:13+00:00","modifiedAt":"2026-08-04T22:00:24.1029588+00:00","affected":[{"ecosystem":"npm","name":"ghost","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"5.18.0"},{"kind":"fixed","version":"6.21.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/TryGhost/Ghost/security/advisories/GHSA-chgm-3698-jm42","https://nvd.nist.gov/vuln/detail/CVE-2026-53947","https://github.com/TryGhost/Ghost/pull/26752","https://github.com/TryGhost/Ghost/commit/fb2bb634653d99de68fc42d415721d755284fe30","https://github.com/TryGhost/Ghost","https://github.com/TryGhost/Ghost/releases/tag/v6.21.1"],"sourceUrl":"https://github.com/advisories/GHSA-chgm-3698-jm42","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-chgm-3698-jm42","identifiers":["GHSA-chgm-3698-jm42","BIT-ghost-2026-53947","CVE-2026-53947"]},"retained":false,"historicalAffected":[]}],"coverage":[]}