CVE-2026-53943

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{"affected": [{"affectedData": [{"product": "Ghost", "vendor": "TryGhost", "versions": [{"status": "affected", "version": ">= 4.0.0, < 6.37.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Ghost es un sistema de gesti\u00f3n de contenido Node.js. Desde hasta 6.37.0, cuando Ghost est\u00e1 detr\u00e1s de una capa de cach\u00e9 compartida que resulta en que el contenido en cach\u00e9 se comparte entre diferentes visitantes, un usuario no autenticado podr\u00eda enviar una cabecera x-ghost-preview que alteraba la respuesta renderizada del frontend. En configuraciones de cach\u00e9 afectadas, esa respuesta podr\u00eda ser almacenada y servida a visitantes posteriores que soliciten la misma p\u00e1gina, permitiendo el envenenamiento de cach\u00e9 de la salida de vista previa espec\u00edfica de la solicitud. Cuando se ejecuta el frontend y el panel de administraci\u00f3n de Ghost en el mismo dominio, esto podr\u00eda usarse para tomar el control de cuentas de usuario del personal. Cuando se ejecutan estos en diferentes dominios, las cuentas del personal no tienen exposici\u00f3n. Esta vulnerabilidad est\u00e1 corregida en 6.37.0."}], "id": "CVE-2026-53943", "lastModified": "2026-10-25T22:10:00.150", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.6, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 6.0, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53943", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-24T18:40:56.579441Z", "version": "2.0.3"}}]}, "published": "2026-06-24T19:17:11.820", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-62q6-4hv4-vjrw"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-524"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,6.37.0)"}}], "enrichment": {"confidence": 88.0, "confidence_source": "matching", "scores": [{"score": 88.0, "source": "matching"}]}, "original": {"product": "Ghost", "source": "cna", "vendor": "TryGhost"}, "product": "ghost", "vendor": "ghost"}], "created": "2026-06-24T19:45:05.747610+00:00", "updated": "2026-06-25T13:15:03.629951+00:00", "vendors": ["ghost", "ghost$PRODUCT$ghost"]}