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    <lastBuildDate>Wed, 07 Oct 2026 04:38:30 +0000</lastBuildDate>
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      <title>CVE-2026-24687 — Umbraco.Forms has path traversal and file enumeration vulnerability in Linux/Mac</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-24687</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Umbraco.Forms.Issues&lt;/p&gt;
&lt;p&gt;Umbraco Forms is a form builder that integrates with the Umbraco content management system. It&amp;#39;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&amp;#39;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Umbraco.Forms.Issues&lt;/p&gt;
&lt;p&gt;Umbraco Forms is a form builder that integrates with the Umbraco content management system. It&amp;#39;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&amp;#39;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.&lt;/p&gt;</content:encoded>
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