CVE-2026-28208

Received Received - Intake

Path Traversal in Junrar LocalFolderExtractor Enables Remote Code Execution

Publication date: 2026-02-26

Last updated on: 2026-03-02

Assigner: GitHub, Inc.

Description

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.

CVSS Scores

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Meta Information

Published

2026-02-26

Last Modified

2026-03-02

Generated

2026-07-06

AI Q&A

2026-02-27

EPSS Evaluated

2026-07-05

NVD

CVE-2026-28208

EUVD

EUVD-2026-8909

Affected Vendors & Products

Vendor	Product	Version / Range
junrar_project	junrar	to 7.5.8 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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.

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Junrar open source Java RAR archive library prior to version 7.5.8. It is a backslash path traversal flaw in the LocalFolderExtractor component. An attacker can craft a malicious RAR archive that, when extracted on Linux or Unix systems, allows writing arbitrary files anywhere on the filesystem.

This means the attacker can place files with attacker-controlled content in locations they normally should not have access to, potentially overwriting important files.

Impact Analysis

The vulnerability can lead to serious impacts such as remote code execution. For example, an attacker could overwrite shell profiles, source code, cron jobs, or other critical files on the system.

This unauthorized file write can compromise system integrity, allow persistent access, or disrupt normal operations.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, upgrade Junrar to version 7.5.8 or later, which contains the fix for the backslash path traversal issue.

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