CVE-2026-56384

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Source
https://cve.org/CVERecord?id=CVE-2026-56384
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56384.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-56384
Aliases
Published
2026-06-21T13:27:00.378Z
Modified
2026-07-08T08:13:46.971049558Z
Severity
  • 5.3 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
Craft CMS - Missing Authorization in assets/preview-thumb Endpoint
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56384.json",
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-862"
    ]
}
References

Affected packages

Git / github.com/craftcms/cms

Affected ranges

Type
GIT
Repo
https://github.com/craftcms/cms
Events
Introduced
daac7c1da2f701f2e9ddee1da1457ce61660b581
Introduced
04755d93f86d07cc183db47db8a0eee106892e30
Fixed
3262cfa628ade304f0e565f9e45b52fab0f32df3
Fixed
13c50dd550fabe74fe5317aeca090d286f1c7556
Fixed
d30df3112220db1ffd6726a3ed11857014c7fb27
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "4.0.0-RC1"
        },
        {
            "fixed": "4.17.8"
        },
        {
            "introduced": "5.0.0-RC1"
        },
        {
            "fixed": "5.9.14"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56384.json"