CVE-2026-39973

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Source
https://cve.org/CVERecord?id=CVE-2026-39973
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39973.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-39973
Aliases
Downstream
Published
2026-04-21T01:35:22Z
Modified
2026-10-28T02:30:37Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N CVSS Calculator
Summary
Apktool: Path Traversal to Arbitrary File Write
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39973.json"
}
References

Affected packages

Git / github.com/ibotpeaches/apktool

Affected ranges

Type
GIT
Repo
https://github.com/ibotpeaches/apktool
Events
Introduced
f770b39e425af4fa6ac4ca1e9ea6c4824339c6d3
Fixed
1c1d15b070c2138d958fa8b685d430c49c4bb117
Fixed
e10a0450c7afcd9462c0b76bcbff0e7428b92bdd
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:apktool:apktool:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "3.0.0"
                },
                {
                    "fixed": "3.0.2"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "e10a0450c7afcd9462c0b76bcbff0e7428b92bdd"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v3.0.2",
            "range": [
                {
                    "fixed": "1c1d15b070c2138d958fa8b685d430c49c4bb117"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v3.*
v3.0.0
v3.0.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39973.json"