Input validation error in Ghost - CVE-2026-29053
Published: April 27, 2026
Vulnerability identifier: #VU128208
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-29053
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to improper input validation in the theme installation and processing functionality when handling specially crafted themes. A remote privileged user can install a specially crafted malicious theme to execute arbitrary code.
User interaction is required to install the crafted theme.
Affected software
Ghost
How to mitigate CVE-2026-29053
Install security update from vendor's website.
Ghost - update to 6.19.1