CVE-2026-22597: Medium Vulnerability in Ghost

Ghost is a Node.js content management system. In versions 5.38.0 through 5.130.5 and 6.0.0 through 6.10.3, a vulnerability in Ghost’s media inliner mechanism allows staff users in possession of a valid authentication token for the Ghost Admin API to exfiltrate data from internal systems via SSRF. This issue has been patched in versions 5.130.6 and 6.11.0.

The severity of this vulnerability is classified as medium, with a CVSS score of 5.1. This classification indicates that the impact on organizations could be significant, considering the potential for unauthorized data access.

Risk to organizations includes the possibility of sensitive data being exposed to unauthorized users. Given the nature of the vulnerability, it is critical for organizations using affected versions to address this issue promptly.

Organizations should prioritize patching immediately. The patched versions of Ghost eliminate this vulnerability, thus safeguarding against the outlined risks.

The vulnerability has been analyzed and is documented under CWE-918, indicating it is related to SSRF (Server-Side Request Forgery) issues.

Vulnerability Details

This vulnerability allows staff users with valid authentication tokens for the Ghost Admin API to exploit the media inliner mechanism, leading to potential data exfiltration from internal systems.

The CVSS score associated with this vulnerability is 5.1 (medium severity), which indicates a moderate risk for organizations, particularly those relying on the affected versions of Ghost.

Technical Analysis

The root cause of this vulnerability lies within Ghost’s media inliner mechanism, which improperly handles requests, allowing for SSRF attacks. The attack vector is classified as network-based with low complexity.

Attackers require high privileges to exploit this vulnerability, as they need valid authentication tokens. User interaction is not required to trigger the vulnerability.

The impacts on confidentiality, integrity, and availability are categorized as low, none, and none, respectively.

Risk & Impact Analysis

Real-world deployment risk for this vulnerability is moderate, as organizations that utilize Ghost without applying the patches may face unauthorized access to sensitive data. The blast radius potential includes any internal systems accessible by authenticated users.

Organizations should evaluate the urgency based on the CVSS score and the potential for exploitation. Immediate action is advised to mitigate any risks associated with this vulnerability.

Exploitation Status

Affected Versions

The affected versions of Ghost are 5.38.0 through 5.130.5 and 6.0.0 through 6.10.3. Organizations must ensure they upgrade to versions 5.130.6 and 6.11.0 or later to mitigate this vulnerability.

Mitigation & Remediation

Organizations should immediately apply the patch to update to Ghost versions 5.130.6 or 6.11.0. If patching is not possible, organizations should consider implementing additional security controls to limit access to the Ghost Admin API.

For further guidance on security practices, organizations can refer to our penetration testing services.

Detection Guidance

Organizations should monitor logs for any unusual access patterns to the Ghost Admin API and review user permissions to enhance their security posture.

AppSecure Threat Intelligence Insight

The long-term significance of this vulnerability lies in the increasing trend of SSRF issues in web applications. Security teams must learn from this incident to enhance their defensive strategies.

Organizations are encouraged to adopt a comprehensive penetration testing methodology to identify and remediate similar vulnerabilities proactively.

Furthermore, understanding application security best practices is crucial. For detailed insights, organizations can refer to our vulnerability management program guide.

Finally, continuous monitoring and adaptation of security measures are essential to keep up with evolving threats. For more information on security testing, see our web application penetration testing resources.