Data Exposure Vulnerability in Ghost CMS by TryGhost
CVE-2026-53947

5.3MEDIUM

Key Information:

Vendor

Tryghost

Status
Ghost
Vendor
CVE Published:
24 June 2026

What is CVE-2026-53947?

A security flaw in Ghost, a Node.js content management system, existed in versions ranging from 5.18.0 to 6.21.1. This issue allowed unauthenticated attackers to exploit discrepancies in responses from the members' signin endpoints, making it possible to confirm whether specific email addresses were associated with registered accounts. This raised significant privacy concerns for users of Ghost sites. The vulnerability was addressed in version 6.21.1, thereby enhancing the protection of user data against unauthorized access.

Affected Version(s)

Ghost >= 5.18.0, < 6.21.1

References

https://github.com/TryGhost/Ghost/security/advisories/GHS...
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CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.