CVE-2026-39973— Apktool: Path Traversal to Arbitrary File Write
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I. Basic Information for CVE-2026-39973
Vulnerability Information
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Vulnerability Title
Apktool: Path Traversal to Arbitrary File Write
Source: NVD (National Vulnerability Database)
Vulnerability Description
Apktool is a tool for reverse engineering Android APK files. In versions 3.0.0 and 3.0.1, a path traversal vulnerability in `brut/androlib/res/decoder/ResFileDecoder.java` allows a maliciously crafted APK to write arbitrary files to the filesystem during standard decoding (`apktool d`). This is a security regression introduced in commit e10a045 (PR #4041, December 12, 2025), which removed the `BrutIO.sanitizePath()` call that previously prevented path traversal in resource file output paths. An attacker can embed `../` sequences in the `resources.arsc` Type String Pool to escape the output directory and write files to arbitrary locations, including `~/.ssh/config`, `~/.bashrc`, or Windows Startup folders, escalating to RCE. The fix in version 3.0.2 re-introduces `BrutIO.sanitizePath()` in `ResFileDecoder.java` before file write operations.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Apktool 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apktool是Connor Tumbleson个人开发者的一款对Android APK文件进行逆向工程的工具。 Apktool 3.0.0版本和3.0.1版本存在路径遍历漏洞，该漏洞源于brut/androlib/res/decoder/ResFileDecoder.java文件存在路径遍历问题，可能导致恶意APK在标准解码过程中向文件系统写入任意文件，从而提升至远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| iBotPeaches | Apktool | >= 3.0.0, < 3.0.2 | - |
II. Public POCs for CVE-2026-39973
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|---|
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IV. Related Vulnerabilities
Same product: Apktool
Same weakness: CWE-22
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