CVE-2026-29053
Ghost 0.7.2 – 6.19.1
Raw vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2026-29053 is a high-severity Injection (CWE-74) vulnerability in Ghost Ghost. Its CVSS base score is 7.6 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 30% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2026-29053 is an arbitrary code execution vulnerability affecting Ghost, a Node.js content management system. The flaw exists in versions 0.7.2 through 6.19.0, where specifically crafted malicious themes can execute arbitrary code on the server running Ghost. It is classified under CWE-74 (Injection) with a CVSS v3.1 base score of 7.6 (AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H), indicating high severity due to its potential impact across confidentiality, integrity, and availability.
Exploitation requires a high-privilege user, such as an administrator, to interact with a malicious theme, likely by uploading or installing it via the Ghost admin interface over a network connection. The high attack complexity and user interaction prerequisites limit feasibility, but successful exploitation grants attackers a scope change with server-side code execution privileges, enabling full compromise of the hosting environment.
The issue has been addressed in Ghost version 6.19.1. Additional details on the vulnerability and patch are available in the GitHub Security Advisory at https://github.com/TryGhost/Ghost/security/advisories/GHSA-cgc2-rcrh-qr5x. Security practitioners should upgrade to the patched version and review theme sources for any signs of compromise.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-9788
Vulnerability Data
Ghost is a Node.js content management system. From version 0.7.2 to 6.19.0, specifically crafted malicious themes can execute arbitrary code on the server running Ghost. This issue has been patched in version 6.19.1.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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Mitigating Controls (NIST 800-53 r5) AI
SI-10 directly requires validation of information inputs to reject malformed or special-element content before it reaches downstream parsers.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices directly require input validation and output encoding that prevent injection flaws.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Security testing in development catches injection vulnerabilities before release.
Logging supports detection of injection attempts but does not prevent the weakness.
Monitoring activities can identify active injection attacks after they occur.
Secure development life cycle mandates input validation and output encoding that directly prevent injection flaws.
Application security requirements explicitly call for controls against injection attacks in software design.
Secure architecture principles reduce injection surfaces but do not prescribe specific neutralization techniques.