{"id":"CVE-2026-70593","aliases":["BIT-ghost-2026-70593","GHSA-cjc9-q5gf-327p"],"url":"https://o3.security/vulnerability/CVE-2026-70593","summary":"Ghost: Theme Upload Path Traversal","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 [security@ghost.org](mailto:security@ghost.org).","published":"2026-08-04T21:49:49.968Z","modified":"2026-10-28T02:31:03.330055370Z","cvss":{"score":6.6,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:L"},"epss":{"score":0.0029,"percentile":0.21653,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"ghost","fixedVersion":"6.54.1"}],"fix":{"url":"https://github.com/TryGhost/Ghost/commit/fbaa92327e52607036a1e42204c9eadcc751d82c","label":"TryGhost/Ghost@fbaa923"},"references":[{"type":"WEB","url":"https://github.com/TryGhost/Ghost/releases/tag/v6.54.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70593.json"},{"type":"ADVISORY","url":"https://github.com/TryGhost/Ghost/security/advisories/GHSA-cjc9-q5gf-327p"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70593"},{"type":"FIX","url":"https://github.com/TryGhost/Ghost/commit/fbaa92327e52607036a1e42204c9eadcc751d82c"},{"type":"PACKAGE","url":"https://github.com/TryGhost/Ghost"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:31:03.330055370Z"}}