CVE-2026-53947
Ghost: Member existence leak via magic link sign-in response
5.3
MEDIUM
CVSS 3.1
EPSS 0.21%
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.
How to fix CVE-2026-53947
To remediate CVE-2026-53947, upgrade the affected package to a fixed version below.
- —upgrade to 6.21.1 or later
Is CVE-2026-53947 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 5.18.0, < 6.21.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |