{"id":"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.","aliases":["GHSA-chgm-3698-jm42"],"modified":"2026-06-26T11:56:29.092909299Z","published":"2026-06-24T18:07:42.965Z","database_specific":{"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53947.json","cwe_ids":["CWE-204"]},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/tryghost/ghost","events":[{"introduced":"b5fd02c9e8839f148713972fb9b87e47fa0a9351"},{"fixed":"1d36c589d39f979327106bbcfb4cece7abaea502"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"5.18.0"},{"fixed":"6.21.1"}]}}],"versions":["v6.21.0","v6.20.1","v6.20.0","v6.19.4","v6.19.3","v6.19.2","v6.19.0","v6.19.1","v6.18.2","v6.18.0","v6.17.1","v6.17.0","v6.16.1","v6.16.0","v6.15.0","v6.14.0","v6.13.2","v6.13.1","v6.13.0","v6.12.0","v6.11.0","v6.10.3","v6.10.0","v6.9.3","v6.9.2","v6.9.0","v6.8.1","v6.8.0","v6.7.0","v6.6.0","v6.5.3","v6.5.2","v6.5.0","v6.4.0","v6.3.1","v6.2.0","v6.3.0","v6.1.0","v6.0.10","v6.0.8","v6.0.7","v6.0.6","v6.0.5","v6.0.4","v6.0.3","v6.0.1","v6.0.0","v6.0.0-rc.3","v6.0.0-rc.2","v6.0.0-rc.1","v6.0.0-rc.0","v6.0.0-alpha.2","v5.130.1","v5.130.0","v5.129.2","v5.129.1","v5.129.0","v5.128.0","v5.127.1","v5.127.0","v5.126.0","v5.125.1","v5.122.0","v5.121.0","v5.120.2","v5.120.0","v5.119.2","v5.119.0","v5.118.1","v5.118.0","v5.117.0","v5.116.2","v5.116.0","v5.115.1","v5.114.0","v5.113.0","v5.112.0","v5.111.0","v5.110.2","v5.110.0","v5.109.6","v5.109.3","v5.109.0","v5.108.1","v5.108.0","v5.107.0","v5.106.1","v5.106.0","v5.105.0","v5.104.0","v5.103.0","v5.102.0","v5.101.6","v5.101.4","v5.101.0","v5.99.0","v5.100.0","v5.98.0","v5.97.0","v5.96.1","v5.96.0","v5.95.0","v5.94.2","v5.94.1","v5.94.0","v5.93.0","v5.92.0","v5.91.0","v5.90.0","v5.89.2","v5.89.1","v5.89.0","v5.88.2","v5.88.1","v5.88.0","v5.87.2","v5.87.1","v5.87.0","v5.86.2","v5.86.1","v5.86.0","v5.85.1","v5.85.0","v5.84.2","v5.84.1","v5.84.0","v5.83.0","v5.82.12","v5.82.11","v5.82.9","v5.82.6","v5.82.4","v5.82.3","v5.82.2","v5.82.1","v5.82.0","v5.81.1","v5.81.0","v5.80.4","v5.80.3","v5.80.2","v5.80.0","v5.79.5","v5.79.3","v5.79.2","v5.79.1","v5.79.0","v5.78.0","v5.77.0","v5.76.0","@tryghost/portal@2.37.0","@tryghost/portal@2.36.5","v5.75.0","v5.74.4","v5.74.0","v5.73.1","v5.73.0","v5.72.0","v5.71.0","v5.70.1","v5.70.0","v5.69.1","v5.69.0","v5.68.0","v5.67.1","v5.67.0","v5.66.0","v5.65.0","v5.63.0","v5.62.0","v5.61.0","v5.60.0","@tryghost/comments-ui@0.13.0","v5.59.2","v5.59.0","v5.58.0","v5.57.0","v5.56.0","v5.55.0","v5.54.2","v5.54.1","v5.54.0","v5.53.3","v5.53.1","@tryghost/announcement-bar@1.1.7","@tryghost/portal@2.33.4","@tryghost/portal@2.33.3","v5.53.0","@tryghost/announcement-bar@1.1.6","@tryghost/signup-form@0.1.3","v5.52.0","@tryghost/admin-x-settings@0.0.8","@tryghost/signup-form@0.1.2","@tryghost/portal@2.33.2","@tryghost/admin-x-settings@0.0.7","@tryghost/signup-form@0.1.1","v5.51.0","@tryghost/signup-form@0.1.0","@tryghost/signup-form@0.0.3","@tryghost/portal@2.33.1","v5.49.3","@tryghost/portal@2.33.0","v5.49.1","@tryghost/signup-form@0.0.1","@tryghost/admin-x-settings@0.0.6","@tryghost/portal@2.32.0","@tryghost/portal@2.31.2","v5.48.0","@tryghost/admin-x-settings@0.0.5","@tryghost/admin-x-settings@0.0.4","@tryghost/admin-x-settings@0.0.3","@tryghost/admin-x-settings@0.0.2","v5.47.1","@tryghost/portal@2.31.1","@tryghost/portal@2.31.0","@tryghost/portal@2.30.1","v5.47.0","@tryghost/portal@2.30.0","v5.46.0","v5.45.1","v5.45.0","v5.44.0","@tryghost/portal@2.29.3","@tryghost/portal@2.29.2","v5.43.0","@tryghost/portal@2.29.1","@tryghost/portal@2.29.0","v5.42.2","@tryghost/portal@2.28.1","v5.42.0","@tryghost/portal@2.28.0","@tryghost/portal@2.27.0","v5.41.0","@tryghost/portal@2.26.0","v5.40.1","v5.40.0","v5.39.0","v5.38.0","v5.37.0","v5.36.0","v5.35.0","@tryghost/portal@2.25.0","v5.34.0","v5.33.0","v5.31.0","v5.30.1","v5.30.0","v5.28.0","@tryghost/portal@2.24.1","@tryghost/portal@2.24.0","v5.27.0","@tryghost/portal@2.23.0","v5.26.4","v5.26.3","v5.26.2","v5.26.1","v5.26.0","v5.25.5","@tryghost/portal@2.22.0","v5.25.3","@tryghost/portal@2.21.0","v5.25.0","@tryghost/portal@2.20.3","@tryghost/portal@2.20.2","v5.24.0","v5.23.0","@tryghost/portal@2.20.1","@tryghost/portal@2.20.0","v5.22.10","@tryghost/portal@2.19.9","v5.22.6","@tryghost/portal@2.19.8","@tryghost/portal@2.19.7","@tryghost/portal@2.19.6","@tryghost/portal@2.19.5","v5.21.0","@tryghost/portal@2.19.3","@tryghost/portal@2.18.0","@tryghost/portal@2.17.0","@tryghost/portal@2.16.0","v5.20.0","v5.19.0","v5.18.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53947.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}