Input Validation Vulnerability in Ghost CMS Affecting Staff User Sessions
CVE-2026-70596

4.3MEDIUM

Key Information:

Vendor

Tryghost

Status
Ghost
Vendor
CVE Published:
5 August 2026

What is CVE-2026-70596?

An input validation issue in Ghost, a popular Node.js content management system, affects versions 4.9.0 to 6.54.1. This vulnerability allows a staff user to exploit the feature_image_caption to hijack another staff user's session in the Ghost Admin interface, leading to potential privilege escalation. The issue has been addressed in version 6.54.1.

Affected Version(s)

Ghost >= 4.9.0, < 6.54.1

References

https://github.com/TryGhost/Ghost/security/advisories/GHS...
x_refsource_CONFIRM
https://github.com/TryGhost/Ghost/pull/29635
x_refsource_MISC
https://github.com/TryGhost/Ghost/commit/a8bea3a4ceec4c85...
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.