{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.2.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0bc38fb5e76c38ab24e36acf7a17887370e31fb4"
            }
          ],
          "repo": "https://github.com/develar/app-builder",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "certcc",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13723.json"
  },
  "details": "A vulnerability in the `zipx.Unzip` extraction routine of Develar's app-builder allows an attacker to overwrite arbitrary files on macOS APFS by exploiting a Unicode Normalization Collision combined with symlink following behavior. APFS treats certain Unicode equivalent filenames as identical (e.g., ß ↔ ss), while app builder performs no canonical normalization before validating or writing paths. As a result, a crafted ZIP archive containing:\r\n•\ta symlink entry named ss pointing to a target file, and\r\n•\ta regular file named ß containing attacker controlled data,\r\nwill cause the second write to follow the symlink and overwrite the target file.",
  "id": "CVE-2026-13723",
  "modified": "2026-07-31T03:33:56.248121140Z",
  "published": "2026-07-29T17:25:22.185Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://kb.cert.org/vuls/id/293714"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/293714"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13723.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13723"
    },
    {
      "type": "FIX",
      "url": "https://github.com/develar/app-builder/pull/163"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/develar/app-builder"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Develar's electron-builder allows arbitrary file overwrite"
}