CVE-2026-53945: Tryghost Ghost

Medium severity, CVSS 4.0. EPSS: 0.2% chance of exploitation in the next 30 days.

Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, Ghost’s private-IP check for outbound HTTP requests could be bypassed via DNS rebinding, allowing an attacker to coerce the Ghost server into reaching hosts on internal networks through features that issue external fetches. This vulnerability is fixed in 6.21.1.

Affected products

• Tryghost Ghost: from 6.0.9, before 6.21.1 (fixed in 6.21.1)

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