CVE-2026-53943 (GCVE-0-2026-53943)
Vulnerability from cvelistv5 – Published: 2026-06-24 18:13 – Updated: 2026-06-24 18:48
VLAI
EPSS
VEX
Title
Ghost: Cache-poisoning XSS in Ghost frontend via x-ghost-preview header
Summary
Ghost is a Node.js content management system. From until 6.37.0, when Ghost is behind a shared caching layer that results in cached content being shared between different visitors, an unauthenticated user could send an x-ghost-preview header that altered the rendered frontend response. In affected cache configurations, that response could be stored and served to subsequent visitors requesting the same page, allowing cache poisoning of request-specific preview output. When running Ghost's frontend and admin panel on the same domain this could be used to take over staff user accounts. When running these on different domains staff accounts have no exposure. This vulnerability is fixed in 6.37.0.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-24 18:40 UTC
CWE
- CWE-524 - Use of Cache Containing Sensitive Information
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/TryGhost/Ghost/security/adviso… | x_refsource_CONFIRM |
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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