CVE-2026-44012

描述

## Summary `AssetsController::actionShowInFolder()` fetches an asset by ID and returns its filename and complete folder hierarchy (including volume handle, volume UID, folder names, folder UIDs, and folder URI paths) without checking whether the requesting user has `viewAssets` or `viewPeerAssets` permission on the asset’s volume. Any authenticated CP user — even one with zero volume permissions — can enumerate asset filenames and the full folder structure of any volume by supplying arbitrary asset IDs. This follows the exact same incomplete-patch pattern as four GHSAs merged on 2026-02-25 (GHSA-x76w-8c62-48mg, GHSA-vgjg-248p-rfm2, GHSA-5pgf-h923-m958, GHSA-3pvf-vxrv-hh9c), all of which added `requireVolumePermissionByAsset()` + `requirePeerVolumePermissionByAsset()` to sibling AssetsController actions. The `actionShowInFolder` method was introduced thirteen days before the patch wave and was not included in it. ## Details The vulnerability is in `src/controllers/AssetsController.php` at line 1437. The method: 1. Calls `requireCpRequest()` — verifies the request targets the CP, enforces `accessCp` permission via `Controller::_enforceAllowAnonymous()`, but does NOT enforce any volume-level permission. 2. Fetches any asset by ID with `Asset::findOne($assetId)` — no `editable`/`savable` scope filter, so all assets across all volumes are reachable. 3. Returns sensitive structural data via JSON. ## Impact - Any authenticated control panel user with only `accessCp` permission can discover the filenames and complete folder structure (names, UIDs, handles, URIs) of assets in volumes they are not authorized to access. - Sensitive volume structures — private document repositories, confidential media, internal file names — are exposed to any user who can log into the control panel. - This enables targeted follow-up attacks: an attacker who knows a private asset’s filename and folder path may have other avenues to exfiltrate the actual file. ## Resources https://github.com/craftcms/cms/commit/e3f3eaab3d85badd713cfc2c24e5f0792ecdb586

如何修補 CVE-2026-44012

要修補 CVE-2026-44012,請將受影響套件升級到下列已修補版本。

• —升級至 5.9.18 或更新版本

CVE-2026-44012 正在被利用嗎?

低 — EPSS 為 0.0%,目前沒有觀察到大規模利用活動。