Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-54550— IzPack: Path Traversal in UnpackerBase allows writing files outside the installation directory via malicious pack entries

Quick assessment

Affected
izpack izpack
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IzPack 是一款广泛使用的工具，用于将 Java 平台上的应用程序打包为跨平台安装程序。在 5.2.6 及更早版本中， 中的 方法会获取由攻击者控制的 的 ，并将其传入 处理，而该方法仅转换路径分隔符，并未对父目录层级进行规范化，也未强制限制目标路径必须位于安装目录内。因此，恶意安装包的条目若包含 序列，当受害者运行该安装程序时，攻击者可以利用此缺陷，以受害者的权限将文件写入计划安装目录之外的位置，例如启动文件夹、可执行文件搜索路径或其他可访问位置。

CVSS 7.4 · High

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
izpack izpack <= 5.2.6 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-54550

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
IzPack: Path Traversal in UnpackerBase allows writing files outside the installation directory via malicious pack entries
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
izpack izpack <= 5.2.6 -

II. Public POCs for CVE-2026-54550

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 2417 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-54550

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-54550 (3)

Vendor Advisories for CVE-2026-54550 (1)

IV. Related Vulnerabilities

Same weakness: CWE-22

V. Comments for CVE-2026-54550

No comments yet

Leave a comment