CVE-2026-53945 — MEDIUM (4.0)

Vulnerability 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.

CVSS Score

4.0

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

NONE

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-367 CWE-918

References

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

FAQ

What is CVE-2026-53945?

CVE-2026-53945 is a vulnerability with a CVSS score of 4.0 (MEDIUM). 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...

How severe is CVE-2026-53945?

CVE-2026-53945 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-53945?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.