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

Quick assessment

Affected
junrar junrar
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Junrar是一个普通 Java Unrar 库。用于读取和提取 .Rar 文件。 Junrar 7.5.8之前版本存在路径遍历漏洞，该漏洞源于LocalFolderExtractor中存在反斜杠路径遍历，可能导致任意文件写入和远程代码执行。

CVSS 5.9 · Medium EPSS 0.77% · P55
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I. Basic Information for CVE-2026-28208

Vulnerability Information
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Vulnerability Title
Junrar has arbitrary file write due to backslash path traversal bypass in LocalFolderExtractor on Linux/Unix
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Junrar 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Junrar是一个普通 Java Unrar 库。用于读取和提取 .Rar 文件。 Junrar 7.5.8之前版本存在路径遍历漏洞，该漏洞源于LocalFolderExtractor中存在反斜杠路径遍历，可能导致任意文件写入和远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
junrar junrar < 7.5.8 -

II. Public POCs for CVE-2026-28208

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III. Intelligence Information for CVE-2026-28208

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Vendor Advisories for CVE-2026-28208 (1)

IV. Related Vulnerabilities

Same product: junrar
Same vendor: junrar
Same weakness: CWE-22

V. Comments for CVE-2026-28208

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