GHSA-m8mh-x359-vm8mHighCVSS 7.1
Apktool: Path Traversal to Arbitrary File Write
🔗 CVE IDs covered (1)
📋 Description
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.
🎯 Affected products1
- maven/org.apktool:apktool-lib:>= 3.0.0, < 3.0.2
🔗 References (6)
- https://github.com/iBotPeaches/Apktool/security/advisories/GHSA-m8mh-x359-vm8m
- https://nvd.nist.gov/vuln/detail/CVE-2026-39973
- https://github.com/iBotPeaches/Apktool/pull/4041
- https://github.com/iBotPeaches/Apktool/commit/e10a0450c7afcd9462c0b76bcbff0e7428b92bdd#diff-cd531ebe1014bfd18185bf21585ca5cdb16fbcb07703ebc47949a1b4e4e36bc3
- https://github.com/iBotPeaches/Apktool/releases/tag/v3.0.2
- https://github.com/advisories/GHSA-m8mh-x359-vm8m