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CVE-2026-56384

MEDIUM
4.3
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-56384
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-06-21 02:05 UTC
Published
2026-06-21 13:27 UTC
Last updated
2026-06-21 13:27 UTC
Primary CWE
CWE-862
Missing Authorization
Vendor / Product
craftcms / cms
Sources
cve.org  ·  NVD

Severity & Metrics

4.3 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Affected products (1)
VendorProductPlatformVersions
craftcms cms — 4.0.0-RC1 < 4.17.8, 4.17.8, 5.0.0-RC1 < 5.9.14, 5.9.14
Weakness (CWE)
CWESourceDescription
CWE-862 cna Missing Authorization
CVSS scores (2)
ScoreSeverityVersionSourceVector
5.3 MEDIUM 4.0 cna 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
4.3 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
References (3)
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