CVE-2026-53947 — Ghost: Member existence leak via magic link sign-in response

CVE-2026-53947

Ghost: Member existence leak via magic link sign-in response PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
TryGhost / Ghost	affected >= 5.18.0, < 6.21.1

CWE

CWE-204

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.