CVE-2026-70595
Received Received - Intake

Server-Side Request Forgery in Ghost CMS

Publication date: 2026-08-05

Last updated on: 2026-08-05

Assigner: GitHub, Inc.

Description
Ghost is a Node.js content management system. From 6.26.0 until 6.54.1, a validation issue allowed some functionality, such as Webmentions, to be abused by an unauthenticated user to make limited HTTP requests to hosts in the Ghost server's internal network. A successful attack would not result in any response data being returned. This vulnerability is fixed in 6.54.1.

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Meta Information

Published
2026-08-05
Last Modified
2026-08-05
Generated
2026-08-05
AI Q&A
2026-08-05
EPSS Evaluated
N/A
NVD
CVE-2026-70595
EUVD
EUVD-2026-53388

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
ghost ghost From 6.26.0 (inc) to 6.54.1 (inc)
tryghost ghost From 6.26.0 (inc) to 6.54.1 (exc)
tryghost ghost 6.54.1

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

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Executive Summary

This is a Server-Side Request Forgery (SSRF) vulnerability in Ghost CMS versions 6.26.0 to 6.54.0. It allows unauthenticated users to make limited HTTP requests to internal network hosts through features like Webmentions, but no response data is returned to the attacker.

Detection Guidance

Detecting this vulnerability requires checking Ghost CMS versions between 6.26.0 and 6.54.0. Run 'ghost version' in your Ghost installation directory or check package.json for the version. Monitor network logs for unusual outbound HTTP requests from the Ghost server to internal hosts, especially via Webmentions functionality.

Impact Analysis

An attacker could exploit this to probe internal network hosts, potentially mapping internal infrastructure or attempting further attacks. However, no sensitive data is exposed, and the attack is limited to outbound requests without responses.

Compliance Impact

This vulnerability does not directly violate GDPR or HIPAA as no data is exposed or leaked. However, it may pose indirect risks by allowing network reconnaissance, which could lead to further breaches if other vulnerabilities exist.

Mitigation Strategies

Immediately update Ghost CMS to version 6.54.1 or later. For Docker installations, pull the latest image and redeploy. For Ghost-CLI, run 'ghost update'. Disable Webmentions functionality if not needed until updated. Restrict outbound network access from the Ghost server as an additional precaution.

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