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CVE-2026-53948

CVE-2026-53948 · Ghost: File Upload Content-Type Spoofing

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Ghost is a Node.js content management system. From 6.19.4 until 6.21.1, insufficient validation of the client-supplied Content-Type on Ghost's Admin API file upload endpoint allowed uploaded files to be served from the site with an attacker-chosen content type on S3/GCS storage backends. On installations that serve uploaded files from the same origin as the site, this could have been used to facilitate stored cross-site scripting against site visitors or staff. This vulnerability is fixed in 6.21.1.

CVSS 5.4 · Moyenne · EPSS 0,2% · Correctif disponible

Publication
Mise à jour

Pile logicielle: node

Produits et versions concernés

  • ghost

    Versions du logiciel
    • >= 6.19.4, < 6.21.1: Concernée

    Aucun correctif publié

  • ghost npm

    Plages de versions concernées
    • SEMVER: ≥ 6.19.4, < 6.21.1

    Mettez à jour vers 6.21.1

Sources originales

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