{
"id": "GHSA-chgm-3698-jm42",
"aliases": [
"CVE-2026-53947"
],
"details": "### 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 [[email protected] ](mailto:[email protected] ).",
"summary": "Ghost: Member existence leak via magic link sign-in response",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.18.0"
},
{
"fixed": "6.21.2"
}
]
}
],
"package": {
"name": "ghost",
"ecosystem": "npm"
},
"database_specific": {
"last_known_affected_version_range": "< 6.21.1"
}
}
],
"modified": "2026-08-04T21:56:13Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
}
],
"published": "2026-08-04T21:56:13Z",
"references": [
{
"url": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-chgm-3698-jm42",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53947",
"type": "ADVISORY"
},
{
"url": "https://github.com/TryGhost/Ghost/pull/26752",
"type": "WEB"
},
{
"url": "https://github.com/TryGhost/Ghost/commit/fb2bb634653d99de68fc42d415721d755284fe30",
"type": "WEB"
},
{
"url": "https://github.com/TryGhost/Ghost",
"type": "PACKAGE"
},
{
"url": "https://github.com/TryGhost/Ghost/releases/tag/v6.21.1",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-204"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": "2026-06-24T19:17:12Z",
"github_reviewed_at": "2026-08-04T21:56:13Z"
}
}