{"cve":"CVE-2026-54550","nvd":{"published":"2026-08-26T15:16:49.223","modified":"2026-09-09T21:09:13.080","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N","score":7.4},"cwes":["CWE-22"],"references":["https://github.com/izpack/izpack/commit/4233ba38d0f1825f9cf3e0204e5261a5498e29d8","https://github.com/izpack/izpack/commit/8b7c6792c4fe85e3b1759c106aae39b904848466","https://github.com/izpack/izpack/pull/1193","https://github.com/izpack/izpack/security/advisories/GHSA-f63g-88cj-hjf9","https://github.com/izpack/izpack/security/advisories/GHSA-f63g-88cj-hjf9"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:17.453294893+00:00"},"epss":{"cve":"CVE-2026-54550","score":0.00452,"percentile":0.39279,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-f63g-88cj-hjf9","url":"https://osv.dev/vulnerability/GHSA-f63g-88cj-hjf9","summary":"IzPack has Path Traversal in UnpackerBase that allows writing files outside the installation directory via malicious pack entries","modified":"2026-10-27T15:15:07.956770342Z","packages":[{"ecosystem":"Maven","name":"org.codehaus.izpack:izpack-installer","purl":"pkg:maven/org.codehaus.izpack/izpack-installer","ranges":["<5.2.7"],"fixed":["5.2.7"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}