CVE-2026-56384
published 2026-06-21CVE-2026-56384: Craft CMS contains a missing authorization vulnerability in the assets/preview-thumb endpoint. A Control Panel user without permission to view a target private…
PriorityP423medium4.3CVSS 3.1
AVNACLPRLUINSUCLINAN
EPSS
0.19%
9.2th percentile
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, = 5.0.0-RC1, <= 5.9.13, and is fixed in 4.17.8 and 5.9.14.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| craftcms | cms | >= 4.0.0-RC1 < 4.17.8 | 4.17.8 |
| craftcms | cms | >= 5.0.0-RC1 < 5.9.14 | 5.9.14 |
CVSS provenance
nvdv3.14.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
nvdv4.05.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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VulDB
Craft CMS up to 4.17.7/5.9.13 authorization (GHSA-x76w-8c62-48mg / EUVD-2026-38178)
vuldb·2026-06-21·CVSS 4.3
CVE-2026-56384 [MEDIUM] Craft CMS up to 4.17.7/5.9.13 authorization (GHSA-x76w-8c62-48mg / EUVD-2026-38178)
A vulnerability labeled as problematic has been found in Craft CMS up to 4.17.7/5.9.13. This impacts an unknown function. Executing a manipulation can lead to missing authorization.
The identification of this vulnerability is CVE-2026-56384. The attack may be launched remotely. There is no exploit available.
The affected component should be upgraded.
GHSA
Craft CMS contains a missing authorization vulnerability in the assets/preview-thumb endpoint.
ghsa_unreviewed·2026-06-21
CVE-2026-56384 [MEDIUM] CWE-862 Craft CMS contains a missing authorization vulnerability in the assets/preview-thumb endpoint.
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, = 5.0.0-RC1, <= 5.9.13, and is fixed in 4.17.8 and 5.9.14.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-06-21
Published