CVE-2026-70589: CWE-20: Improper Input Validation in TryGhost Ghost
Ghost, a Node.js content management system, contains an improper input validation vulnerability in versions from 4.22.0 up to 6.54.1. This flaw allowed users to redeem subscription offers that were no longer active. The issue is resolved in version 6.54.1.
AI Analysis
Technical Summary
CVE-2026-70589 is an improper input validation vulnerability (CWE-20) in the Ghost CMS. From versions 4.22.0 until 6.54.1, the system failed to properly validate subscription offer status, allowing users to redeem offers that should have been inactive. This could lead to unauthorized use of subscription benefits. The vulnerability has a CVSS 3.1 base score of 4.8, indicating medium severity. The flaw is fixed in version 6.54.1.
Potential Impact
The vulnerability allows unauthorized redemption of inactive subscription offers, potentially leading to unauthorized access to subscription benefits. The impact is limited to confidentiality and integrity with no availability impact. The attack vector is network with high attack complexity and no privileges or user interaction required.
Mitigation Recommendations
Upgrade Ghost to version 6.54.1 or later, where this improper input validation vulnerability is fixed. No other mitigation or workaround is indicated.
CVE-2026-70589: CWE-20: Improper Input Validation in TryGhost Ghost
Description
Ghost, a Node.js content management system, contains an improper input validation vulnerability in versions from 4.22.0 up to 6.54.1. This flaw allowed users to redeem subscription offers that were no longer active. The issue is resolved in version 6.54.1.
CVSS v3.1
Score 4.8medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-70589 is an improper input validation vulnerability (CWE-20) in the Ghost CMS. From versions 4.22.0 until 6.54.1, the system failed to properly validate subscription offer status, allowing users to redeem offers that should have been inactive. This could lead to unauthorized use of subscription benefits. The vulnerability has a CVSS 3.1 base score of 4.8, indicating medium severity. The flaw is fixed in version 6.54.1.
Potential Impact
The vulnerability allows unauthorized redemption of inactive subscription offers, potentially leading to unauthorized access to subscription benefits. The impact is limited to confidentiality and integrity with no availability impact. The attack vector is network with high attack complexity and no privileges or user interaction required.
Mitigation Recommendations
Upgrade Ghost to version 6.54.1 or later, where this improper input validation vulnerability is fixed. No other mitigation or workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-04T19:50:27.327Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a725cbabf8831d5398274ef
Added to database: 08/04/2026, 21:42:18 UTC
Last enriched: 08/04/2026, 21:59:17 UTC
Last updated: 08/04/2026, 22:06:24 UTC
Views: 4
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