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.