CVE-2026-56384Disclosure

LOWCVSS 5.3 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-862

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

1 mentions across 1 observed day

What's happening

Technical details provided in 1 signal
Disclosure: 1 classified signal
1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Disclosure

1100.0%

Referenced assets1 URL

By indicator

https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-56384

Full discourse1 post

Vulmon Vulnerability Feed@VulmonFeeds91d
Disclosure
CVE-2026-56384 Missing Authorization in Craft CMS Assets Preview-Thumb Endpoint https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-56384
Post summary
The text announces a missing authorization flaw in Craft CMS’s Assets Preview-Thumb endpoint (CVE-2026-56384) with no mention of PoC, exploit code, or active exploitation, and it does not provide a patch or workaround.
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