{"id":"CVE-2026-53947","state":"PUBLISHED","title":"Ghost: Member existence leak via magic link sign-in response","description":"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.","publishedAt":"2026-06-24T18:07:42.965Z","updatedAt":"2026-06-25T17:09:22.498Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["TryGhost Ghost"],"affected":[{"vendor":"TryGhost","product":"Ghost","versions":[{"version":">= 5.18.0, < 6.21.1","status":"affected"}]}],"references":["https://github.com/TryGhost/Ghost/security/advisories/GHSA-chgm-3698-jm42"],"weaknesses":["CWE-204"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53947.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53947","state":"PUBLISHED","datePublished":"2026-06-24T18:07:42.965Z","dateUpdated":"2026-06-25T17:09:22.498Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-11T15:50:01.281Z"},"containers":{"cna":{"title":"Ghost: Member existence leak via magic link sign-in response","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"TryGhost","product":"Ghost","versions":[{"version":">= 5.18.0, < 6.21.1","status":"affected"}]}],"references":[{"url":"https://github.com/TryGhost/Ghost/security/advisories/GHSA-chgm-3698-jm42","name":"https://github.com/TryGhost/Ghost/security/advisories/GHSA-chgm-3698-jm42","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-204","lang":"en","description":"CWE-204: Observable Response Discrepancy","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-24T18:07:42.965Z"},"source":{"advisory":"GHSA-chgm-3698-jm42","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-25T17:09:11.479372Z","id":"CVE-2026-53947","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-25T17:09:22.498Z"}}]}}}