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CVE-2026-53943

CRITICAL
9.6
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-53943
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-11 15:50 UTC
Published
2026-06-24 18:13 UTC
Last updated
2026-06-24 18:48 UTC
Primary CWE
CWE-524
CWE-524: Use of Cache Containing Sensitive Information
Vendor / Product
TryGhost / Ghost
Sources
cve.org  ·  NVD

Severity & Metrics

9.6 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
TryGhost Ghost — >= 4.0.0, < 6.37.0
Weakness (CWE)
CWESourceDescription
CWE-524 cna CWE-524: Use of Cache Containing Sensitive Information
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.6 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
References (1)
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