{"id":"CVE-2026-56385","title":"Craft CMS - Authorization Bypass in assets/preview-file Endpoint","summary":"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, allowi…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cvssSource":"cna","cwe":["CWE-639"],"vendor":"craftcms","product":"cms","affected":["cms >= 5.0.0-RC1 < 5.9.14","cms >= 4.0.0-RC1 < 4.17.8"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-06-22T12:18:03.133816Z"},"published":"2026-06-21","updated":"2026-11-08","sourceUpdated":"2026-11-08T14:06:10.554Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-56385","references":[{"url":"https://github.com/craftcms/cms/security/advisories/GHSA-44px-qjjc-xrhq","label":"GitHub Security Advisory (GHSA-44px-qjjc-xrhq)"},{"url":"https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27","label":"https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27"},{"url":"https://www.vulncheck.com/advisories/craft-cms-authorization-bypass-in-assets-preview-file-endpoint","label":"VulnCheck Advisory: Craft CMS - Authorization Bypass in assets/preview-file Endpoint"}],"tags":["cve.org"],"epss":0.00359,"epssPercentile":0.29908,"ingestedAt":"2026-11-08T14:51:22.351Z","slug":"CVE-2026-56385","body":"## Overview\n\nCraft 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.\n\n## Affected\n\n- `cms >= 5.0.0-RC1 < 5.9.14`\n- `cms >= 4.0.0-RC1 < 4.17.8`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}