要点
- CVE-2026-24687 は Umbraco.Forms, umbraco forms (umbraco) に影響する深刻度「中」 (CVSS 6.5) の脆弱性です。
- 今後30日間に悪用される確率（EPSS）：0.46%（全脆弱性の 39.6% より高い）。
- 対処：16.4.1, 17.1.1 以降に更新してください。
| パッケージ | 影響を受けるバージョン | 修正済みバージョン |
|---|
| Umbraco.Forms NuGet | ≥ 16.0.0, < 16.4.1≥ 17.0.0, < 17.1.1
| 16.4.117.1.1
|
| umbraco forms | ≥ 16.0.0, < 16.4.1≥ 17.0.0, < 17.1.1
| 16.4.117.1.1
|
概要
Impact
It's possible for an authenticated backoffice-user to enumerate and traverse paths/files on the systems filesystem and read their contents, on Mac/Linux Umbraco installations using Forms. As Umbraco Cloud runs in a Windows environment, Cloud users aren't affected.
Patches
This issue affects versions 16 and 17 of Umbraco Forms and is patched in 16.4.1 and 17.1.1
Workarounds
If upgrading is not immediately possible, users can mitigate this vulnerability by:
- Configuring a WAF or reverse proxy to block requests containing path traversal sequences (
../, ..\) in the fileName parameter of the export endpoint
- Restricting network access to the Umbraco backoffice to trusted IP ranges
- Blocking the
/umbraco/forms/api/v1/export endpoint entirely if the export feature is not required
However, upgrading to the patched version is strongly recommended.
References
Credit to Kevin Joensen from Baldur Security for finding this vulnerability
NVD の説明
Umbraco Forms is a form builder that integrates with the Umbraco content management system. It's possible for an authenticated backoffice-user to enumerate and traverse paths/files on the systems filesystem and read their contents, on Mac/Linux Umbraco installations using Forms. As Umbraco Cloud runs in a Windows environment, Cloud users aren't affected. This issue affects versions 16 and 17 of Umbraco Forms and is patched in 16.4.1 and 17.1.1. If upgrading is not immediately possible, users can mitigate this vulnerability by configuring a WAF or reverse proxy to block requests containing path traversal sequences (`../`, `..\`) in the `fileName` parameter of the export endpoint, restricting network access to the Umbraco backoffice to trusted IP ranges, and/or blocking the `/umbraco/forms/api/v1/export` endpoint entirely if the export feature is not required. However, upgrading to the patched version is strongly recommended.
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