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CVE-2026-53943

CVE-2026-53943 · Ghost: Cache-poisoning XSS in Ghost frontend via x-ghost-preview header

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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.

CVSS 9.6 · Critique · EPSS 0,4% · Correctif disponible

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Mise à jour

Pile logicielle: node

Produits et versions concernés

  • ghost

    Versions du logiciel
    • >= 4.0.0, < 6.37.0: Concernée

    Aucun correctif publié

  • ghost npm

    Plages de versions concernées
    • SEMVER: ≥ 4.0.0, < 6.37.0

    Mettez à jour vers 6.37.0

Sources originales

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