CVE-2026-39973

描述

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](https://github.com/iBotPeaches/Apktool/commit/e10a0450c7afcd9462c0b76bcbff0e7428b92bdd#diff-cd531ebe1014bfd18185bf21585ca5cdb16fbcb07703ebc47949a1b4e4e36bc3) ([PR #4041](https://github.com/iBotPeaches/Apktool/pull/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.

如何修補 CVE-2026-39973

要修補 CVE-2026-39973,請將受影響套件升級到下列已修補版本。

• —升級至 3.0.2 或更新版本

CVE-2026-39973 正在被利用嗎?

低 — EPSS 為 0.0%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• >= 3.0.0, < 3.0.2

CVSS 分數

參考連結(6)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-39973
• PATCHgithub.com/iBotPeaches/Apktool
• WEBgithub.com/iBotPeaches/Apktool/commit/e10a0450c7afcd9462c0b76bcbff0e7428b92bdd#diff-cd531ebe1014bfd18185bf21585ca5cdb16fbcb07703ebc47949a1b4e4e36bc3
• WEBgithub.com/iBotPeaches/Apktool/pull/4041