CVE-2026-53947 — MEDIUM (5.3)

Vulnerability 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 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Related Weaknesses (CWE)

CWE-204

References

https://github.com/TryGhost/Ghost/security/advisories/GHSA-chgm-3698-jm42

FAQ

What is CVE-2026-53947?

CVE-2026-53947 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 wheth...

How severe is CVE-2026-53947?

CVE-2026-53947 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-53947?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.