GHSA-F4H3-QHG5-J6MQ Duplicate Advisory: Craft CMS: Authorized asset "preview file" requests bypass allows users without asset access to retrieve private preview metadata

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-44px-qjjc-xrhq. This link is maintained to preserve external references. Original Description Craft CMS versions = 5.0.0-RC1, = 4.0.0-RC1, = 4.17.7 contain an authorization bypass in the assets/preview-file...

Duplicate Advisory: Craft CMS: Authenticated "assets/preview-thumb" discloses signed fallback transform preview link to CP users without asset-view permission

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-x76w-8c62-48mg. This link is maintained to preserve external references. Original Description Craft CMS contains a missing authorization vulnerability in the assets/preview-thumb endpoint. A Control Panel user...

CVE-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 asset can call the endpoint with an attacker-controlled assetId and receive preview HTML containing a signed fallback transform preview...

CVE-2026-56385

Craft CMS versions = 5.0.0-RC1, = 4.0.0-RC1, = 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled assetId for an...

CVE-2026-56394

Craft CMS from 4.0.0-RC1 contains an authenticated path traversal vulnerability in the assets/icon endpoint where the extension parameter is not validated before file existence checks. Attackers can bypass extension validation by passing traversal sequences that resolve to existing SVG files,...

CVE-2026-56394

Craft CMS 4.0.0-RC1 contains an authenticated path traversal in the assets/icon endpoint. The extension parameter is not validated before file-existence checks, allowing traversal sequences to resolve to existing SVG files and enabling local file read access. Root cause is improper validation of ...

CVE-2026-56394 Craft CMS - Authenticated Path Traversal in assets/icon Extension Parameter

Craft CMS from 4.0.0-RC1 contains an authenticated path traversal vulnerability in the assets/icon endpoint where the extension parameter is not validated before file existence checks. Attackers can bypass extension validation by passing traversal sequences that resolve to existing SVG files,...

CVE-2026-56394 Craft CMS - Authenticated Path Traversal in assets/icon Extension Parameter

Craft CMS from 4.0.0-RC1 contains an authenticated path traversal vulnerability in the assets/icon endpoint where the extension parameter is not validated before file existence checks. Attackers can bypass extension validation by passing traversal sequences that resolve to existing SVG files,...

CVE-2026-56394

Craft CMS from 4.0.0-RC1 contains an authenticated path traversal vulnerability in the assets/icon endpoint where the extension parameter is not validated before file existence checks. Attackers can bypass extension validation by passing traversal sequences that resolve to existing SVG files,...

EUVD-2026-38160

Craft CMS from 4.0.0-RC1 contains an authenticated path traversal vulnerability in the assets/icon endpoint where the extension parameter is not validated before file existence checks. Attackers can bypass extension validation by passing traversal sequences that resolve to existing SVG files,...

CVE-2026-56394 Craft CMS - Authenticated Path Traversal in assets/icon Extension Parameter

Craft CMS from 4.0.0-RC1 contains an authenticated path traversal vulnerability in the assets/icon endpoint where the extension parameter is not validated before file existence checks. Attackers can bypass extension validation by passing traversal sequences that resolve to existing SVG files,...

CVE-2026-56385

Craft CMS suffers an authorization bypass in the assets/preview-file endpoint. Versions affected: 5.0.0-RC1–5.9.13 and 4.0.0-RC1–4.17.7. An authenticated low-privileged user can supply an assetId for an asset they should not view and still receive preview data (previewHtml), including a private p...

CVE-2026-56385 Craft CMS - Authorization Bypass in assets/preview-file Endpoint

Craft CMS versions = 5.0.0-RC1, = 4.0.0-RC1, = 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled assetId for an...

EUVD-2026-38179

Craft CMS versions = 5.0.0-RC1, = 4.0.0-RC1, = 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled assetId for an...

CVE-2026-56385

Craft CMS versions = 5.0.0-RC1, = 4.0.0-RC1, = 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled assetId for an...

CVE-2026-56385 Craft CMS - Authorization Bypass in assets/preview-file Endpoint

Craft CMS versions = 5.0.0-RC1, = 4.0.0-RC1, = 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled assetId for an...

CVE-2026-56384 Craft CMS - Missing Authorization in 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...

CVE-2026-56384

Craft CMS has a missing authorization vulnerability in the assets/preview-thumb endpoint. A Control Panel user without permission to view a private asset can call the endpoint with an attacker-controlled assetId and receive preview HTML containing a signed fallback transform preview link for that...

CVE-2026-56384 Craft CMS - Missing Authorization in 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...

CVE-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 asset can call the endpoint with an attacker-controlled assetId and receive preview HTML containing a signed fallback transform preview...