{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54550","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-15T19:04:14.456Z","datePublished":"2026-08-26T14:24:06.879Z","dateUpdated":"2026-08-26T15:37:00.917Z"},"containers":{"cna":{"title":"IzPack: Path Traversal in UnpackerBase allows writing files outside the installation directory via malicious pack entries","problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/izpack/izpack/security/advisories/GHSA-f63g-88cj-hjf9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/izpack/izpack/security/advisories/GHSA-f63g-88cj-hjf9"},{"name":"https://github.com/izpack/izpack/pull/1193","tags":["x_refsource_MISC"],"url":"https://github.com/izpack/izpack/pull/1193"},{"name":"https://github.com/izpack/izpack/commit/4233ba38d0f1825f9cf3e0204e5261a5498e29d8","tags":["x_refsource_MISC"],"url":"https://github.com/izpack/izpack/commit/4233ba38d0f1825f9cf3e0204e5261a5498e29d8"},{"name":"https://github.com/izpack/izpack/commit/8b7c6792c4fe85e3b1759c106aae39b904848466","tags":["x_refsource_MISC"],"url":"https://github.com/izpack/izpack/commit/8b7c6792c4fe85e3b1759c106aae39b904848466"}],"affected":[{"vendor":"izpack","product":"izpack","versions":[{"version":"<= 5.2.6","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-26T14:24:06.879Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-f63g-88cj-hjf9","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/izpack/izpack/security/advisories/GHSA-f63g-88cj-hjf9","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-26T15:36:54.267935Z","id":"CVE-2026-54550","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-26T15:37:00.917Z"}}]}}