{"id":"CVE-2026-56385","aliases":["GHSA-44px-qjjc-xrhq"],"url":"https://o3.security/vulnerability/CVE-2026-56385","summary":"Craft CMS - Authorization Bypass in assets/preview-file Endpoint","details":"Craft CMS versions >= 5.0.0-RC1, <= 5.9.13 and >= 4.0.0-RC1, <= 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled assetId for an asset they are not permitted to view and still receive preview response data (previewHtml), including a private preview image route containing the target private assetId. Fixed in 5.9.14 and 4.17.8.","published":"2026-06-21T13:27:01.066Z","modified":"2026-08-12T03:51:32.420707124Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"craftcms/cms","fixedVersion":"5.9.14"},{"ecosystem":"Packagist","name":"craftcms/cms","fixedVersion":"4.17.8"}],"fix":{"url":"https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27","label":"craftcms/cms@d30df31"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56385.json"},{"type":"ADVISORY","url":"https://github.com/craftcms/cms/security/advisories/GHSA-44px-qjjc-xrhq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56385"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/craft-cms-authorization-bypass-in-assets-preview-file-endpoint"},{"type":"FIX","url":"https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:32.420707124Z"}}