{
"id": "GHSA-cjc9-q5gf-327p",
"aliases": [
"CVE-2026-70593"
],
"details": "### Impact\n\nA 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.\n\n### Vulnerable versions\n\nThis vulnerability is present in Ghost from v0.10.0 up to v6.54.0.\n\n### Patches\n\nv6.54.1 contains a fix for this issue.\n\n### How to update\n\nFor self-hosters using Docker, find [Docker's official Ghost image here](https://hub.docker.com/_/ghost). Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost). \n\nIf your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update). \n\n### References\n\nGhost thanks Stephen Sims, Off By One Security for disclosing this vulnerability responsibly.\n\n### For more information\n\nIf you have any questions or comments about this advisory, email Ghost at [[email protected] ](mailto:[email protected] ).",
"summary": "Ghost: Theme Upload Path Traversal",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0.10.0"
},
{
"fixed": "6.54.1"
}
]
}
],
"package": {
"name": "ghost",
"ecosystem": "npm"
}
}
],
"modified": "2026-08-04T21:49:56Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:L"
}
],
"published": "2026-08-04T21:49:56Z",
"references": [
{
"url": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-cjc9-q5gf-327p",
"type": "WEB"
},
{
"url": "https://github.com/TryGhost/Ghost/commit/fbaa92327e52607036a1e42204c9eadcc751d82c",
"type": "WEB"
},
{
"url": "https://github.com/TryGhost/Ghost",
"type": "PACKAGE"
},
{
"url": "https://github.com/TryGhost/Ghost/releases/tag/v6.54.1",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-22"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": null,
"github_reviewed_at": "2026-08-04T21:49:56Z"
}
}