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.
INFO
Published Date :
2026-04-21T01:35:22.396Z
Last Modified :
2026-04-23T03:56:04.482Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-39973 vulnerability.
| Vendors | Products |
|---|---|
| Apktool |
|
| Ibotpeaches |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-39973.
