Publish GHSA-r3r2-35v9-v238

Author: advisory-database[bot]

advisories/github-reviewed/2026/03/GHSA-r3r2-35v9-v238/GHSA-r3r2-35v9-v238.json

@@ -0,0 +1,69 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-r3r2-35v9-v238",
+  "modified": "2026-03-23T21:40:10Z",
+  "published": "2026-03-23T21:40:10Z",
+  "aliases": [
+    "CVE-2026-33430"
+  ],
+  "summary": "Briefcase: Windows MSI Installer Privilege Escalation via Insecure Directory Permissions ",
+  "details": "### Impact\n\nIf a developer uses Briefcase to produce an Windows MSI installer for a project, and that project is installed for All Users (i.e., per-machine scope), the installation process creates an directory that inherits all the permissions of the parent directory. Depending on the location chosen by the installing user, this may allow a low privilege but authenticated user to replace or modify the binaries installed by the application. If an administrator then runs the altered binary, the binary will run with elevated privileges.\n\n### Patches\n\nThe problem is caused by the template used to generate the WXS file for Windows projects. It was fixed with the following PRs:\n\n* beeware/briefcase-windows-app-template#86\n* beeware/briefcase-windows-VisualStudio-template#85\n\nThese patches have been backported to the templates used in Briefcase 0.3.26, 0.4.0, and 0.4.1. Re-running `briefcase create` on your Briefcase project will result in the updated templates being used.\n\n### Workarounds\n\nThe change from beeware/briefcase-windows-app-template#86 can be added to any existing Briefcase .wxs file generated by Briefcase 0.3.24 or later.\n\n### Resources\n\nbeeware/briefcase#2759 is a formal bug report of the problem.",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "PyPI",
+        "name": "briefcase"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0.3.0"
+            },
+            {
+              "fixed": "0.3.26"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/beeware/briefcase/security/advisories/GHSA-r3r2-35v9-v238"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/beeware/briefcase/issues/2759"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/beeware/briefcase-windows-VisualStudio-template/pull/85"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/beeware/briefcase-windows-app-template/pull/86"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/beeware/briefcase"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-732"
+    ],
+    "severity": "HIGH",
+    "github_reviewed": true,
+    "github_reviewed_at": "2026-03-23T21:40:10Z",
+    "nvd_published_at": null
+  }
+}