What is CVE-2026-53948?

CVE-2026-53948 is a medium-severity vulnerability in Tryghost Ghost, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 5.4/10. Published 2026-06-24.

How severe is CVE-2026-53948?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Arbitrary file upload in Tryghost Ghost

CVE-2026-53948

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 attacke…

Vulnerability class: Unrestricted File Upload

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Tryghost Ghost — versions >= 6.19.4, < 6.21.1

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-53948?: CVE-2026-53948 is a medium-severity vulnerability in Tryghost Ghost, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 5.4/10. Published 2026-06-24.
How severe is CVE-2026-53948?: Medium severity. CVSS v3 base score is 5.4 out of 10.