CVE-2026-22596 is an SQL Injection vulnerability classified under CWE-89 found in the TryGhost content management system, a Node.js-based platform widely used for digital publishing. The vulnerability affects Ghost versions from 5.90.0 up to 5.130.5 and 6.0.0 up to 6.10.3. It specifically resides in the /ghost/api/admin/members/events endpoint, which is part of the Admin API. Authenticated users with Admin API credentials can exploit this flaw to inject and execute arbitrary SQL commands against the backend database. This improper neutralization of special elements in SQL commands allows attackers to manipulate database queries, potentially leading to unauthorized data disclosure, data integrity compromise, and limited denial of service. The vulnerability requires high privileges (Admin API authentication) but does not require user interaction, making it exploitable remotely over the network. The CVSS v3.1 base score is 6.7, reflecting medium severity with high confidentiality and integrity impact but low availability impact. The issue has been addressed in Ghost versions 5.130.6 and 6.11.0, where input sanitization and query handling have been improved to prevent injection. No known exploits are reported in the wild as of publication, but the presence of this vulnerability in a popular CMS used by content publishers poses a significant risk if left unpatched.

For European organizations, the impact of this vulnerability can be substantial, especially for those relying on Ghost as their content management system for websites, blogs, or digital publications. Successful exploitation could lead to unauthorized access to sensitive member data, including personal information and subscription details, violating GDPR and other data protection regulations. Data integrity could be compromised, allowing attackers to alter content or membership records, damaging organizational reputation and trust. Although availability impact is low, manipulation of database queries could cause partial service disruptions. The requirement for Admin API credentials limits exploitation to insiders or attackers who have already compromised administrative accounts, but this also highlights the risk of privilege escalation and insider threats. Organizations in sectors such as media, education, and digital services across Europe could face regulatory penalties and operational disruptions if this vulnerability is exploited.

1. Immediately upgrade affected Ghost installations to versions 5.130.6 or 6.11.0 or later to apply the official patch. 2. Restrict access to the Admin API endpoint by implementing strict network segmentation, IP whitelisting, and multi-factor authentication for administrative accounts. 3. Regularly audit and monitor Admin API usage logs to detect unusual or unauthorized SQL query patterns. 4. Employ Web Application Firewalls (WAFs) with rules tailored to detect and block SQL injection attempts targeting the /ghost/api/admin/members/events endpoint. 5. Conduct periodic security assessments and penetration testing focused on API endpoints to identify potential injection flaws. 6. Enforce the principle of least privilege for API credentials, ensuring only necessary permissions are granted. 7. Backup databases regularly and verify backup integrity to enable recovery in case of data tampering. 8. Educate administrators on secure credential management and the risks of privilege misuse.