CVE-2026-22596 is an SQL Injection vulnerability identified in the Ghost content management system, a popular Node.js-based platform used for digital publishing. The flaw exists in the /ghost/api/admin/members/events endpoint and affects Ghost versions 5.90.0 through 5.130.5 and 6.0.0 through 6.10.3. The vulnerability arises from improper neutralization of special elements in SQL commands (CWE-89), allowing authenticated users with Admin API credentials to inject arbitrary SQL queries. This can lead to unauthorized data disclosure, data modification, and potential compromise of the underlying database integrity. The vulnerability does not require user interaction beyond possessing valid admin credentials, and the attack vector is remote network access. The CVSS v3.1 base score is 6.7, reflecting a medium severity with high impact on confidentiality and integrity, low impact on availability, low attack complexity, and requiring high privileges. No known exploits are currently reported in the wild. The issue has been addressed in Ghost versions 5.130.6 and 6.11.0, where input sanitization and parameterized queries have been implemented to prevent SQL injection. Organizations running affected versions should upgrade promptly to mitigate risk.

For European organizations, this vulnerability poses a significant risk to the confidentiality and integrity of data managed through Ghost CMS platforms. Exploitation could lead to unauthorized access to sensitive member information, content manipulation, or database corruption. This can damage organizational reputation, lead to regulatory non-compliance (e.g., GDPR breaches), and disrupt digital publishing operations. Since the vulnerability requires admin-level credentials, the risk is heightened if credential management is weak or if insider threats exist. The limited availability impact means service disruption is less likely, but data breaches and integrity violations remain critical concerns. Organizations relying on Ghost CMS for customer engagement, content delivery, or membership management must consider this vulnerability a priority for remediation to avoid potential data leaks or manipulation.

1. Immediately upgrade Ghost CMS installations to versions 5.130.6 or 6.11.0 or later, where the vulnerability is patched. 2. Restrict access to the Admin API endpoint strictly to trusted personnel and systems, employing network segmentation and firewall rules. 3. Enforce strong authentication mechanisms, including multi-factor authentication for admin accounts, to reduce the risk of credential compromise. 4. Regularly audit and monitor Admin API usage logs for unusual or unauthorized activity that could indicate exploitation attempts. 5. Implement least privilege principles for API credentials, ensuring that only necessary permissions are granted. 6. Conduct security awareness training for administrators on the risks of SQL injection and credential security. 7. Consider deploying Web Application Firewalls (WAFs) with rules to detect and block SQL injection patterns targeting the Ghost API endpoints. 8. Maintain regular backups of the Ghost CMS database to enable recovery in case of data corruption or unauthorized modifications.