tryghost/ghost · Security
Ghost Vulnerable to Remote Code Execution via Malicious Themes
- GHSA ID
- GHSA-cgc2-rcrh-qr5x
- CVE ID
- CVE-2026-29053
- Severity
- high
- Published
- Updated
- CVSS
- 7.6 · CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
- CVSS v3
- 7.6 · CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
Description
Impact
Specifically crafted malicious themes can execute arbitrary code on the server running Ghost.
Vulnerable Versions
This vulnerability is present in Ghost v0.7.2 to v6.19.0.
Patches
v6.19.1 contains a fix for this issue.
Workarounds
Ghost generally recommends users refrain from installing untrusted themes. If a malicious theme has already been installed, it is recommended to uninstall the theme and then inspect it to understand its impact, which will be attack-specific.
References
Ghost thanks Cristian-Alexandru Staicu at Endor Labs for disclosing this vulnerability responsibly.
For more information
If there are any questions or comments about this advisory, email Ghost at [email protected].
CWEs
- CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')