What’s Vulnerable › Vulnerabilities

CVE-2026-28208: Junrar has arbitrary file write due to backslash path traversal bypass in LocalFolderExtractor on Linux/Unix

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 14.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-26 · updated 2026-06-17
• Weakness: CWE-22

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.

Affected products

• junrar: before 7.5.8 — fixed in 7.5.8

How to fix

Upgrade to a fixed version: junrar 7.5.8. Check the vendor advisory for mitigations.

References

• https://github.com/junrar/junrar/commit/947ff1d33f00f940aa68ae2593500291d799d954
• https://github.com/junrar/junrar/releases/tag/v7.5.8
• https://github.com/junrar/junrar/security/advisories/GHSA-j273-m5qq-6825
• https://github.com/junrar/junrar/security/advisories/GHSA-j273-m5qq-6825

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