Is CVE-2026-70593 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-70593?

CVE-2026-70593 has a CVSS v3 severity of MEDIUM (6.6).

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CVE-2026-70593

Description

Ghost is a Node.js content management system. From 0.10.0 until 6.54.1, a vulnerability in custom themes allowed a staff user to write files outside of the uploads directory. This could be used to alter the behavior of the installation through custom theme upload path traversal in LocalStorageBase and theme storage name handling. This issue is fixed in version 6.54.1.