---
id: CVE-2026-70593
title: Ghost is a Node.js content management system
summary: >-
  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 t…
severity: medium
cvss: 6.6
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:L'
cwe:
  - CWE-22
vendor: ghost
product: ghost
affected:
  - 'ghost >= 0.10.0, < 6.54.1'
patched:
  - ghost 6.54.1
published: '2026-08-04'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:51:43.490'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70593'
references:
  - url: >-
      https://github.com/TryGhost/Ghost/commit/fbaa92327e52607036a1e42204c9eadcc751d82c
    label: security-advisories@github.com
  - url: 'https://github.com/TryGhost/Ghost/releases/tag/v6.54.1'
    label: security-advisories@github.com
  - url: 'https://github.com/TryGhost/Ghost/security/advisories/GHSA-cjc9-q5gf-327p'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-cjc9-q5gf-327p'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.0029
epssPercentile: 0.21757
aliases:
  - GHSA-cjc9-q5gf-327p
ecosystem: npm
ingestedAt: '2026-08-04T22:42:37.973Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-70593)

Affected packages:

- `ghost >= 0.10.0, < 6.54.1`

Patched in:

- `ghost 6.54.1`

Source: https://github.com/advisories/GHSA-cjc9-q5gf-327p