CVE-2026-53947: Tryghost Ghost

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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 products

• Tryghost Ghost: from 5.18.0, before 6.21.1 (fixed in 6.21.1)

Published 2026-06-24. Last modified 2026-06-25.