CVE-2026-53945
Medium
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.
SeverityMedium
CVSS4.0
Exploit probability—
Product
Ghost
PublishedJun 24, 2026
First seenJun 24, 2026
How to fix
Update
- ghost6.21.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ghostnpm | 6.0.9 ≤ v < 6.21.2 | 6.21.2 |
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