CVE-2026-70596: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in TryGhost Ghost
Ghost is a Node.js content management system. From 4.9.0 until 6.54.1, an input validation issue allowed any staff user to create a post with content in feature_image_caption that could be used to hijack another staff user's Ghost Admin session, resulting in privilege escalation. This issue is fixed in 6.54.1.
AI Analysis
Technical Summary
CVE-2026-70596 is a cross-site scripting vulnerability in the feature image captions of the Ghost blogging platform. Due to insufficient input validation, a staff user can inject malicious content into a post that may hijack the session of another staff user in the Ghost Admin interface, resulting in privilege escalation. The vulnerability affects Ghost versions from 4.9.0 up to but not including 6.54.1. The vendor released a patch in version 6.54.1 to address this issue.
Potential Impact
An attacker with staff user privileges can exploit this vulnerability to hijack the session of another staff user in the Ghost Admin interface, potentially escalating privileges. This could lead to unauthorized administrative actions within the Ghost platform. The CVSS score is 4.3 (medium severity), indicating a moderate impact with network attack vector, low complexity, and requiring high privileges and user interaction.
Mitigation Recommendations
Upgrade Ghost to version 6.54.1 or later, which contains the official fix for this vulnerability. For self-hosted instances using Docker, update using the official Ghost Docker image and follow the documented update procedures. For Ghost-CLI installations, follow the official update documentation to upgrade to the latest patched version.
CVE-2026-70596: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in TryGhost Ghost
Description
Ghost is a Node.js content management system. From 4.9.0 until 6.54.1, an input validation issue allowed any staff user to create a post with content in feature_image_caption that could be used to hijack another staff user's Ghost Admin session, resulting in privilege escalation. This issue is fixed in 6.54.1.
CVSS v3.1
Score 4.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-70596 is a cross-site scripting vulnerability in the feature image captions of the Ghost blogging platform. Due to insufficient input validation, a staff user can inject malicious content into a post that may hijack the session of another staff user in the Ghost Admin interface, resulting in privilege escalation. The vulnerability affects Ghost versions from 4.9.0 up to but not including 6.54.1. The vendor released a patch in version 6.54.1 to address this issue.
Potential Impact
An attacker with staff user privileges can exploit this vulnerability to hijack the session of another staff user in the Ghost Admin interface, potentially escalating privileges. This could lead to unauthorized administrative actions within the Ghost platform. The CVSS score is 4.3 (medium severity), indicating a moderate impact with network attack vector, low complexity, and requiring high privileges and user interaction.
Mitigation Recommendations
Upgrade Ghost to version 6.54.1 or later, which contains the official fix for this vulnerability. For self-hosted instances using Docker, update using the official Ghost Docker image and follow the documented update procedures. For Ghost-CLI installations, follow the official update documentation to upgrade to the latest patched version.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-pr22-p9rp-2cqv
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-70596"]
- Ecosystems
- ["npm"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a73572cbf8831d53913cb20
Added to database: 08/05/2026, 15:30:52 UTC
Last enriched: 08/05/2026, 15:32:47 UTC
Last updated: 08/05/2026, 18:46:35 UTC
Views: 4
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