Junrar up to 7.5.7 on Linux/Unix RAR Archive path traversal

Summaryinfo

A vulnerability classified as critical has been found in Junrar up to 7.5.7 on Linux/Unix. This vulnerability affects unknown code of the component RAR Archive Handler. This manipulation causes path traversal. The identification of this vulnerability is CVE-2026-28208. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Junrar up to 7.5.7 on Linux/Unix. It has been declared as critical. Affected by this vulnerability is some unknown processing of the component RAR Archive Handler. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Junrar is an open source java RAR archive library. Prior to version 7.5.8, a backslash path traversal vulnerability in `LocalFolderExtractor` allows an attacker to write arbitrary files with attacker-controlled content anywhere on the filesystem when a crafted RAR archive is extracted on Linux/Unix. This can often lead to remote code execution (e.g., overwriting shell profiles, source code, cron jobs, etc). Version 7.5.8 has a fix for the issue.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-28208 since 02/25/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 7.5.8 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 947ff1d33f00f940aa68ae2593500291d799d954 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-8909). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• Junrar

Version

• 7.5.0
• 7.5.1
• 7.5.2
• 7.5.3
• 7.5.4
• 7.5.5
• 7.5.6
• 7.5.7

License

• open-source

Website

• Product: https://github.com/junrar/junrar/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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