CVE-2026-58052: 7-Zip for Windows fails to preserve Internet-zone marker in RAR5 archives

Summary

A security issue affects 7-Zip for Windows versions up to 26.02. When extracting a specially crafted RAR5 archive, it can allow an attacker to bypass security warnings and modify the extracted file's content. Users should update to the latest version of 7-Zip to ensure this issue is resolved.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software

Vendor	Product	Affected versions
7-zip	7-zip	<= 26.02 `cpe:2.3:a:7-zip:7-zip::::::::`

Original title

7-Zip for Windows through 26.01 fails to preserve the Mark-of-the-Web when extracting a crafted RAR5 archive, because its guard that suppresses an archive-supplied Zone.Identifier stream matches th...

Original description

7-Zip for Windows through 26.01 fails to preserve the Mark-of-the-Web when extracting a crafted RAR5 archive, because its guard that suppresses an archive-supplied Zone.Identifier stream matches the exact name 'Zone.Identifier' while a RAR5 STM record named ':Zone.Identifier:$DATA' is not matched and NTFS canonicalizes it to the same stream, overwriting the propagated Internet-zone marker with ZoneId=0. A second STM record named '::$DATA' overwrites the extracted file's default data stream, letting an attacker defeat SmartScreen/MotW warnings and spoof file content.

nvd CVSS3.1 3.3

nvd CVSS4.0 4.8

Vulnerability type

CWE-693 Protection Mechanism Failure