CVE-2026-105644
Received Received - Intake

SVG Stored XSS in Ghost CMS

Publication date: 2026-10-05

Last updated on: 2026-10-05

Assigner: GitHub, Inc.

Description
Ghost is a Node.js content management system. From 4.0.0 until 6.67.0, SVG images included in content imports were stored without sanitization. An attacker who convinced an Administrator to import a crafted file could host scripts on the site's domain, possibly resulting in compromise of staff users' admin sessions. This issue is fixed in version 6.67.0.

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Meta Information

Published
2026-10-05
Last Modified
2026-10-05
Generated
2026-10-05
AI Q&A
2026-10-05
EPSS Evaluated
N/A
NVD
CVE-2026-105644
EUVD
EUVD-2026-92633

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
TryGhost Ghost >= 4.0.0, < 6.67.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

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Executive Summary

This vulnerability affects Ghost, a Node.js content management system. SVG images imported into content were stored without proper sanitization between versions 4.0.0 and 6.67.0. An attacker could trick an administrator into importing a malicious SVG file, which would execute scripts on the site's domain. This could lead to unauthorized access to staff admin sessions.

Detection Guidance

To detect this vulnerability, check Ghost CMS versions between 4.0.0 and 6.65.0. Verify if SVG files are being imported without sanitization. Inspect server logs for unusual script executions or admin session compromises. Use commands like 'ghost version' to check the version and 'find /path/to/ghost -name "*.svg" -exec file {} \;' to examine SVG files for embedded scripts.

Impact Analysis

If you are an administrator or user with import privileges, an attacker could exploit this to gain control of your admin session. This may allow them to modify content, access sensitive data, or perform administrative actions on your behalf without your knowledge.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. A breach may result in legal penalties, loss of trust, and reputational damage for organizations handling sensitive data.

Mitigation Strategies

Upgrade Ghost to version 6.67.0 or later to address the SVG sanitization issue. Review imported content for suspicious scripts and remove any untrusted files.

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