{"id":"CVE-2026-53948","revision":"e1ed9f7b7f364e1ab95d6de123dea90e","records":[{"revision":"e1ed9f7b7f364e1ab95d6de123dea90e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53948","aliases":[],"title":"Ghost: File Upload Content-Type Spoofing","description":"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 attacker-chosen content type on S3/GCS storage backends. On installations that serve uploaded files from the same origin as the site, this could have been used to facilitate stored cross-site scripting against site visitors or staff. This vulnerability is fixed in 6.21.1.","state":0,"publishedAt":"2026-06-24T18:06:30.077+00:00","modifiedAt":"2026-06-25T13:17:23.333+00:00","affected":[{"ecosystem":"Vendor product","name":"Ghost","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TryGhost\",\n                    \"product\": \"Ghost\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 6.19.4, < 6.21.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4,"severity":"MEDIUM"}],"references":["https://github.com/TryGhost/Ghost/security/advisories/GHSA-944x-pm95-3jpr"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53948","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53948","identifiers":["CVE-2026-53948"]},"retained":false,"historicalAffected":[]}],"coverage":[]}