{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "5.2.6"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4233ba38d0f1825f9cf3e0204e5261a5498e29d8"
            },
            {
              "fixed": "8b7c6792c4fe85e3b1759c106aae39b904848466"
            }
          ],
          "repo": "https://github.com/izpack/izpack",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-f63g-88cj-hjf9"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54550.json"
  },
  "details": "IzPack is a widely used tool for packaging applications on the Java platform as cross-platform installers. In 5.2.6 and earlier, UnpackerBase.unpack() in izpack-installer/src/main/java/com/izforge/izpack/installer/unpacker/UnpackerBase.java obtains an attacker-controlled PackFile targetPath, passes it through IoHelper.translatePath(), which only converts separators, and constructs a File without normalizing parent-directory segments or enforcing destination containment. A malicious installer pack entry containing ../ sequences can therefore write outside the intended installation directory to startup folders, executable search paths, or other locations accessible with the victim's privileges when the victim runs the installer.",
  "id": "CVE-2026-54550",
  "modified": "2026-08-28T11:30:30.632605494Z",
  "published": "2026-08-26T14:24:06.879Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54550.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/izpack/izpack/security/advisories/GHSA-f63g-88cj-hjf9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54550"
    },
    {
      "type": "FIX",
      "url": "https://github.com/izpack/izpack/commit/4233ba38d0f1825f9cf3e0204e5261a5498e29d8"
    },
    {
      "type": "FIX",
      "url": "https://github.com/izpack/izpack/commit/8b7c6792c4fe85e3b1759c106aae39b904848466"
    },
    {
      "type": "FIX",
      "url": "https://github.com/izpack/izpack/pull/1193"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "IzPack: Path Traversal in UnpackerBase allows writing files outside the installation directory via malicious pack entries"
}