Critical SQL Injection Vulnerability in Ghost CMS (CVE-2026-26980)

🇬🇧 English Version

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TL;DR

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A critical SQL injection vulnerability (CVE-2026-26980) in Ghost CMS versions 3.24.0 through 6.19.0 allows unauthenticated attackers to read arbitrary data from the database. The flaw has been fixed in version 6.19.1. Immediate upgrade is recommended.

What Happened

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On [date], a critical security advisory was published for Ghost, a popular Node.js content management system. The vulnerability, tracked as CVE-2026-26980, affects all versions from 3.24.0 up to (but not including) 6.19.1. It enables unauthenticated remote attackers to perform arbitrary read operations on the underlying database, potentially exposing sensitive information.

Technical Details

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The vulnerability is classified as CWE-89 (SQL Injection). The CVSS v3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L, with a base score of 9.4 (Critical). The attack requires no authentication and no user interaction, and can be executed over the network. The issue stems from insufficient sanitization of user input in certain API endpoints, allowing an attacker to inject malicious SQL queries. Successful exploitation could lead to unauthorized data access and potential modification of limited data.

Impact & Risk

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• Confidentiality: High – attackers can read arbitrary database contents, including user credentials, session tokens, and private content.
• Integrity: High – limited data modification may be possible.
• Availability: Low – the vulnerability does not directly cause denial of service.
• Attack Complexity: Low – no special conditions required.
• User Interaction: None – exploitation does not require any action from legitimate users.
• Scope: Unchanged – the vulnerable component and the impacted component are the same.

Given the critical severity and ease of exploitation, all Ghost instances running affected versions are at high risk.

Mitigation / Recommendations

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1. Upgrade immediately: Update Ghost to version 6.19.1 or later. The fix is included in this release.
2. Review database logs: Check for any signs of unauthorized queries or data access.
3. Rotate secrets: If compromise is suspected, rotate all API keys, session secrets, and database credentials.
4. Monitor for unusual activity: Enable logging and alerting on database access patterns.
5. Apply principle of least privilege: Ensure database accounts used by Ghost have minimal necessary permissions.

References

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• GitHub Commit
• Release v6.19.1
• Security Advisory GHSA-w52v-v783-gw97
• Blog Post by XLab

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