Publish GHSA-hm5p-82g6-m3xh

Author: advisory-database[bot]

advisories/github-reviewed/2026/01/GHSA-hm5p-82g6-m3xh/GHSA-hm5p-82g6-m3xh.json

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+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-hm5p-82g6-m3xh",
+  "modified": "2026-01-30T14:43:18Z",
+  "published": "2026-01-30T14:43:18Z",
+  "aliases": [
+    "CVE-2026-24687"
+  ],
+  "summary": "Umbraco.Forms has Path Traversal and File Enumeration Vulnerabilities in Linux/Mac",
+  "details": "### Impact\nIt'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. \n\n### Patches\nThis issue affects versions 16 and 17 of Umbraco Forms and is patched in 16.4.1 and 17.1.1\n\n### Workarounds\nIf upgrading is not immediately possible, users can mitigate this vulnerability by:\n* Configuring a WAF or reverse proxy to block requests containing path traversal sequences (`../`, `..\\`) in the `fileName` parameter of the export endpoint\n* Restricting network access to the Umbraco backoffice to trusted IP ranges\n* Blocking the `/umbraco/forms/api/v1/export` endpoint entirely if the export feature is not required\n\nHowever, upgrading to the patched version is strongly recommended.\n\n### References\nCredit to Kevin Joensen from Baldur Security for finding this vulnerability",
+  "severity": [
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "NuGet",
+        "name": "Umbraco.Forms"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "16.0.0"
+            },
+            {
+              "fixed": "16.4.1"
+            }
+          ]
+        }
+      ]
+    },
+    {
+      "package": {
+        "ecosystem": "NuGet",
+        "name": "Umbraco.Forms"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "17.0.0"
+            },
+            {
+              "fixed": "17.1.1"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/umbraco/Umbraco.Forms.Issues/security/advisories/GHSA-hm5p-82g6-m3xh"
+    },
+    {
+      "type": "ADVISORY",
+      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24687"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/umbraco/Umbraco.Forms.Issues"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-22"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2026-01-30T14:43:18Z",
+    "nvd_published_at": "2026-01-29T20:16:10Z"
+  }
+}