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CVE-2026-53945 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:4.9 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L

CNA: [email protected]CVSS-B:4 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/TryGhost/Ghost/security/advisories/GHSA-ch52-px8q-f22j	[email protected]	AdvisoryRemedyVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-367	Time-of-check Time-of-use (TOCTOU) Race Condition	[email protected]
CWE-918	Server-Side Request Forgery (SSRF)	[email protected]

Affected Products

Product	Versions
Ghost	>= 6.0.9, < 6.21.1 (semver)
CPE cpe:2.3:a:ghost:ghost::::::node.js::* cpe:2.3:a:ghost:ghost:::::::: Remediation Upgrade: 6.21.1moderate efforthttps://hub.docker.com/_/ghost Workaround:low effort Implement egress firewall rules to prevent the Ghost server from initiating connections to RFC1918 networks, loopback, link-local (including 169.254.169.254), and any other internal service ranges. Disable features that trigger outbound fetches (oEmbed, webmentions, recommendations) to further limit the attack surface.

Product

Versions

Ghost

>= 6.0.9, < 6.21.1 (semver)

CPE

cpe:2.3:a:ghost:ghost:*:*:*:*:*:node.js:*:*
cpe:2.3:a:ghost:ghost:*:*:*:*:*:*:*:*

Remediation

Upgrade: 6.21.1moderate efforthttps://hub.docker.com/_/ghost
Workaround:low effort
Implement egress firewall rules to prevent the Ghost server from initiating connections to RFC1918 networks, loopback, link-local (including 169.254.169.254), and any other internal service ranges. Disable features that trigger outbound fetches (oEmbed, webmentions, recommendations) to further limit the attack surface.

Change History

2 change records found show changes

Date	Action	Recorded By
Jun 25, 2026	CVE Modified	CISA-ADP
Jun 24, 2026	New CVE Received	[email protected]