{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-56384", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-06-21T02:05:47.495Z", "datePublished": "2026-06-21T13:27:00.378Z", "dateUpdated": "2026-06-21T13:27:00.378Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-06-21T13:27:00.378Z"}, "datePublic": "2026-06-02T00:00:00.000Z", "title": "Craft CMS - Missing Authorization in assets/preview-thumb Endpoint", "descriptions": [{"lang": "en", "value": "Craft CMS contains a missing authorization vulnerability in the assets/preview-thumb endpoint. A Control Panel user without permission to view a target private asset can call the endpoint with an attacker-controlled assetId and receive preview HTML containing a signed fallback transform preview link for that private asset, because no asset-view permission check is performed before preview generation. This affects versions >= 4.0.0-RC1, <= 4.17.7 and >= 5.0.0-RC1, <= 5.9.13, and is fixed in 4.17.8 and 5.9.14."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Missing Authorization", "cweId": "CWE-862", "type": "CWE"}]}], "affected": [{"vendor": "craftcms", "product": "cms", "defaultStatus": "unaffected", "versions": [{"version": "4.0.0-RC1", "status": "affected", "versionType": "semver", "lessThan": "4.17.8"}, {"version": "4.17.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.0.0-RC1", "status": "affected", "versionType": "semver", "lessThan": "5.9.14"}, {"version": "5.9.14", "status": "unaffected", "versionType": "semver"}], "packageURL": "pkg:composer/craftcms/cms"}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:juzaweb:cms:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0.0-RC1", "versionEndExcluding": "4.17.8"}, {"vulnerable": true, "criteria": "cpe:2.3:a:juzaweb:cms:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0.0-RC1", "versionEndExcluding": "5.9.14"}]}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 5.3, "baseSeverity": "MEDIUM", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS"}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "format": "CVSS"}], "references": [{"url": "https://github.com/craftcms/cms/security/advisories/GHSA-x76w-8c62-48mg", "name": "GHSA Advisory GHSA-x76w-8c62-48mg", "tags": ["vendor-advisory"]}, {"url": "https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27", "name": "https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27", "tags": ["patch"]}, {"name": "VulnCheck Advisory: Craft CMS - Missing Authorization in assets/preview-thumb Endpoint", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/craft-cms-missing-authorization-in-assets-preview-thumb-endpoint"}], "credits": [{"lang": "en", "value": "Susen2", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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