Junrar: Path Traversal (Zip-Slip) via Sibling Directory Name Prefix
Summary
A path traversal vulnerability in LocalFolderExtractor allows an attacker to write arbitrary files with attacker-controlled content into sibling directories when a crafted RAR archive is extracted.
Example
Given an extraction directory set to /tmp/extract, a crafted archive with an entry with the filename as ../extract_evil/file.txt would be actually extracted to /tmp/extract_evil/file.txt.
Details
The createDirectory() and createFile() methods inLocalFolderExtractor validate extraction paths using a string prefix.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | com.github.junrar:junrar | < 7.5.10 | 7.5.10 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N- Weakness (CWE)
CWE-22- Platform
- Java / Kotlin (Maven)
- Package
com.github.junrar:junrar- Disclosed
- 16.04.2026
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-hf5p-q87m-crj7 - CC BY 4.0
Vulnerability history: com.github.junrar:junrar
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 5
- First → latest
- 10.2018 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 3
- Low 1
Disclosures per year
- 2018: 1
- 2019: 0
- 2020: 0
- 2021: 0
- 2022: 1
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 3
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Junrar: Path Traversal (Zip-Slip) via Sibling Directory Name Prefix this entry
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