CVE-2026-53945 PUBLISHED

Ghost: Server-side request forgery via DNS rebinding in external request handling

Assigner: GitHub_M
Reserved: 11.06.2026 Published: 24.06.2026 Updated: 25.06.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS Score: 4

Attack Vector	Network	Scope	Changed
Attack Complexity	High	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	TryGhost
Product	Ghost
Versions	Version >= 6.0.9, < 6.21.1 is affected

References

https://github.com/TryGhost/Ghost/security/advisories/GHSA-ch52-px8q-f22j

Problem Types

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