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Vulnerabilities

Vulnerability · CVE-2026-39973

Apktool is a tool for reverse engineering Android APK files.

Published Apr 21, 2026 · catalog updated Jun 17, 2026 · Apktool is a tool

Check if you run it

No confirmed exploitation is on record for CVE-2026-39973. EPSS is 0.19%. Act only if a listed version of Apktool is a tool is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Apktool is a tool).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.19%
Remediation
Advisory link
Affected products
cpe apktool/apktool

Apktool is a tool for reverse engineering Android APK files. In versions 3.0.0 and 3.0.1, a path traversal vulnerability in allows a maliciously crafted APK to write arbitrary files to the filesystem during standard decoding ( ). This is a security regression introduced in commit e10a045 (PR #4041, December 12, 2025), which removed the call that previously prevented path traversal in resource file output paths. An attacker can embed sequences in the Type String Pool to escape the output directory and write files to arbitrary locations, including , , or Windows Startup folders, escalating to RCE. The fix in version 3.0.2 re-introduces in before file write operations.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe apktool/apktoolversion unspecified

How to fix CVE-2026-39973

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-39973. EPSS is 0.19%. Act only if a listed version of Apktool is a tool is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-22: Path Traversal. EPSS 0.19%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 21, 2026 · NIST NVD

    Detected

    Apktool is a tool for reverse engineering Android APK files. In versions 3.0.0 and 3.0.1, a path traversal vulnerability in allows a maliciously crafted APK to write arbitrary files to the filesystem during standard decoding ( ). This is a security regression introduced in commit e10a045 (PR #4041, December 12, 2025), which removed the call that previously prevented path traversal in resource file

  2. Jun 17, 2026 · NIST NVD

    Updated

    Apktool is a tool for reverse engineering Android APK files. In versions 3.0.0 and 3.0.1, a path traversal vulnerability in allows a maliciously crafted APK to write arbitrary files to the filesystem during standard decoding ( ). This is a security regression introduced in commit e10a045 (PR #4041, December 12, 2025), which removed the call that previously prevented path traversal in resource file

Sources

  • CVE.orgVulnerability recordCVE-2026-39973

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-39973

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-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 allows a maliciously crafted APK to write arbitrary files to the filesystem during standard decoding (`apkto

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.