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CVE-2026-54550

7.4 · HIGH

IzPack is a widely used tool for packaging applications on the Java platform as cross-platform installers.

Published Aug 26, 2026CWE-22EPSS 0.45%

Overview

CVE-2026-54550 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/izpack/izpack/commit/4233ba38d0f1825f9cf3e0204e5261a5498e29d8GitHubgithub.com/izpack/izpack/commit/8b7c6792c4fe85e3b1759c106aae39b904848466GitHubgithub.com/izpack/izpack/pull/1193GitHubgithub.com/izpack/izpack/security/advisories/GHSA-f63g-88cj-hjf9GitHubgithub.com/izpack/izpack/security/advisories/GHSA-f63g-88cj-hjf9

How CyberStrike helps

Frequently asked questions

What is CVE-2026-54550?

CVE-2026-54550 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

How severe is CVE-2026-54550?

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-54550?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-54550?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-54550 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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