Summary
CVE-2026-26980 is a critical SQL injection vulnerability in Ghost CMS versions 3.24.0 to 6.19.0. It allows unauthenticated attackers to access database data, including Admin API keys. Attackers have exploited the flaw to modify website content and inject malicious JavaScript. The issue is fixed in Ghost CMS version 6.19.1.
Urgent Actions Required
- Upgrade Ghost CMS to version 6.19.1 or later immediately.
- Rotate Admin API keys and other credentials that may have been exposed.
- Review application and database logs for evidence of exploitation attempts.
- Audit published content for unauthorized modifications or injected JavaScript.
- Investigate Admin API activity for suspicious or unexpected actions.
- Monitor Content API requests for SQL injection indicators and abnormal access patterns.
- Remove any malicious scripts or unauthorized content discovered during investigations.
Which Systems Are Vulnerable to CVE-2026-26980?
Technical Overview
- Vulnerability Type: SQL Injection (CWE-89)
- Affected Software/Versions: Ghost CMS 3.24.0 through 6.19.0
- CVSS Vector: v3.1
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: Low
- Patch Availability: Yes, available
How Does the CVE-2026-26980 Exploit Work?
The attack typically follows these steps:
What Causes CVE-2026-26980?
Vulnerability Root Cause:
The vulnerability stems from improper handling of user input in Ghost CMS’s Content API. Insufficient input sanitization allows attackers to manipulate database queries and access sensitive information without authentication.
How Can You Mitigate CVE-2026-26980?
If immediate patching is delayed or not possible:
- Restrict access to Ghost Content API endpoints where operationally feasible.
- Deploy a Web Application Firewall (WAF) to detect and block SQL injection attempts.
- Limit access to the Content API using firewall rules or IP allowlisting.
- Monitor Content API requests for suspicious parameters and abnormal activity.
- Enable database and application logging to identify potential exploitation attempts.
- Review access logs for unusual API requests and unexpected database access patterns.
- Apply rate limiting to Content API endpoints to reduce automated exploitation attempts.
Which Assets and Systems Are at Risk?
- Asset Types Affected:
- Ghost CMS Installations - Versions 3.24.0 through 6.19.0
- Content API Endpoints - Vulnerable to unauthenticated SQL injection attacks
- Websites Running Ghost CMS - Sites where attackers can access sensitive database information and modify content using exposed Admin API keys
- Exposure Level:
- Internet-Accessible Ghost CMS Instances - Particularly those running versions 3.24.0 through 6.19.0
- Unpatched Deployments - Systems that have not upgraded to version 6.19.1 or later
How Can You Detect CVE-2026-26980 Exploitation?
Exploitation Signatures:
- Suspicious Content API requests containing malformed or SQL-like input in slug ordering parameters
- Unusual database queries associated with Content API requests
Indicators of Compromise (IOCs/IOAs):
- Unexpected access to sensitive database data, including Admin API keys
- Unauthorized modifications to published articles
- Presence of injected JavaScript within website content
- Unusual Admin API activity or bulk article updates
Behavioral Indicators:
- Abnormal database read activity originating from the Content API
- Unexpected changes to article content
- Malicious JavaScript loaders embedded in web pages
Alerting Strategy:
- Priority: Critical
- Alert on suspicious Content API requests containing SQL injection patterns
- Alert on unauthorized article modifications or bulk content updates
- Alert on unexpected access to Admin API keys or abnormal Admin API activity
Remediation & Response
- Remediation Timeline:
- Immediate: Upgrade Ghost CMS to version 6.19.1 or later
- Immediately after patching: Rotate Admin API keys and other potentially exposed credentials
- As soon as possible: Review logs and investigate for signs of exploitation or unauthorized content changes
- Incident Response Considerations:
- Audit access logs for suspicious Content API and Admin API activity.
- Review website content for unauthorized modifications or injected JavaScript.
- Remove any malicious code found on affected pages.
- Rotate exposed credentials and Admin API keys.
- Notify potentially affected users if site compromise is confirmed.
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CVSS Breakdown Table
| Metric | Value | Description |
|---|---|---|
| Base Score | 9.4 | Critical-severity vulnerability with significant security impact |
| Attack Vector | Network | Can be exploited remotely through the Ghost Content API |
| Attack Complexity | Low | Exploitation does not require complex conditions |
| Privileges Required | None | No authentication is required to exploit the flaw |
| User Interaction | None | Exploitation does not depend on user actions |
| Scope | Unchanged | The vulnerability affects the vulnerable Ghost CMS instance |
| Confidentiality Impact | High | Attackers can access sensitive database information |
| Integrity Impact | High | Exposed Admin API keys can be used to modify website content |
| Availability Impact | Low | Limited impact on service availability |
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