VULNERABILITY INTELLIGENCE

CVE-2026-53945

CVSS score4 MEDIUM
EPSS probability0.21%
CISA KEVNot currently listed
Published2026-06-24
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

Description

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.

Weakness classification

  • CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
  • CWE-918: Server-Side Request Forgery (SSRF)

Primary references