Path traversal in junrar - CVE-2026-28208
Published: April 27, 2026
Vulnerability identifier: #VU128166
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-28208
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: junrar
Affected software:
junrar
junrar
Detailed vulnerability description
The vulnerability allows a remote attacker to write arbitrary files with attacker-controlled content.
The vulnerability exists due to path traversal in LocalFolderExtractor when extracting a crafted RAR archive on Linux/Unix. A remote attacker can supply a specially crafted archive entry with backslash-separated traversal sequences to write arbitrary files with attacker-controlled content.
Windows is not affected because backslashes are treated as path separators there, causing canonical path resolution to block the traversal.
How to mitigate CVE-2026-28208
Install security update from vendor's website.