Cross-site scripting in Ghost - CVE-2026-70596
Published: July 30, 2026 / Updated: August 6, 2026
Vulnerability identifier: #VU140549
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-70596
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to escalate privileges.
The vulnerability exists due to improper input validation in feature image captions when rendering crafted post content in Ghost Admin. A remote privileged user can create a post with crafted content to escalate privileges.
User interaction is required for another staff user to view the crafted content.
Affected software
Ghost
How to mitigate CVE-2026-70596
Install security update from vendor's website.
Ghost - update to 6.54.1