CVE-2026-84800 Craft CMS 5.0.0-RC1 before 5.10.11 File Overwrite via assets/replace-file

Craft CMS versions = 5.0.0-RC1 and 5.10.11 contain a missing authorization vulnerability in AssetsController::actionReplaceFile. When a request supplies sourceAssetId and targetFilename but omits assetId, the target asset is resolved by folder and filename after the permission checks execute, so...