CVE-2026-53945

MEDIUM

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

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 4.0
EPSS 0.0014
EPSS Percentile 3.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-367 CWE-918
Status published
Products (1)
TryGhost/Ghost >= 6.0.9, < 6.21.1
Published Jun 24, 2026
Tracked Since Jun 25, 2026