Medium severity · published Jun 24, 2026
CVE-2026-53947
Ghost: Member existence leak via magic link sign-in response
5.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GH
Ghost · TryGhost
>= 5.18.0, < 6.21.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53947
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-53947
github.com
https://github.com/TryGhost/Ghost/security/advisories/GHSA-chgm-3698-jm42
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