CVE Feed

    Dashboard / CVE / CVE-2026-39973

    CVE-2026-39973

    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.

    Published:Apr 21, 2026
    Last Modified:Apr 23, 2026
    EPS:Apr 21, 2026
    EPSS Score:0.00014
    CVSS Score:7.1

    Affected Products

    Vendor
    Apktool
    Product
    Apktool
    Vendor
    Ibotpeaches
    Product
    Apktool

    Exploits

    https://github.com/frawlaboy/CVE-2026-39973-PoC

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High