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Advisory record · GHSA-f63g-88cj-hjf9

IzPack has Path Traversal in UnpackerBase that allows writing files outside the installation directory via malicious pack entries

CVSS 7.4 HighEPSS 0.0045 · 39th percentile

Published by the GitHub Advisory Database at 26 Aug 2026, 14:24 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.codehaus.izpack:izpack-installerMaven<5.2.75.2.7
Identifiers
GHSA-f63g-88cj-hjf9 · CVE-2026-54550
Weakness (CWE)
CWE-22
Tags
Published
26 Aug 2026
Updated
27 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

IzPack's installer library (org.codehaus.izpack:izpack-installer) versions before 5.2.7 are vulnerable to path traversal in UnpackerBase.unpack(), which does not check that pack-file target paths stay inside the installation directory. An attacker who distributes a repackaged installer can cause the victim's installer to write files to arbitrary locations under the victim's privileges. Users should upgrade to version 5.2.7 or later.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.4 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0045, the 39th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.