High, CVSS 7.1MavenPublished
Apktool: Path Traversal to Arbitrary File Write
CVE-2026-39973 · GHSA-m8mh-x359-vm8m
- Affected
- Maven org.apktool:apktool-lib >= 3.0.0, < 3.0.2
- Fixed in
- 3.0.2· Vendor fix available
- Issue
- 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. Fix: Re-introduce BrutIO.sanitizePath() in ResFileDecoder.java before file write operations.
Recommended action: Upgrade to 3.0.2 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.