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CVE-2026-58052— 7-Zip - Mark-of-the-Web Bypass via RAR5 Alternate Data Stream Name Collision

Quick assessment

Affected
7-Zip 7-Zip
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.

7-Zip是7-Zip个人开发者开源的一个压缩软件。 7-Zip 26.02及之前版本存在处理逻辑错误漏洞，该漏洞源于提取特制RAR5归档时未能保留Web标记，允许攻击者绕过SmartScreen/MotW警告并篡改文件内容。

CVSS 3.3 · Low EPSS 0.17% · P6

Affected Version Matrix 1

VendorProduct Version RangeStatus
7-Zip 7-Zip ≤ 26.01 affected
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I. Basic Information for CVE-2026-58052

Vulnerability Information
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Vulnerability Title
7-Zip - Mark-of-the-Web Bypass via RAR5 Alternate Data Stream Name Collision
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
Source: CVE Program / CVE List V5
Vulnerability Title
7-Zip 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
7-Zip是7-Zip个人开发者开源的一个压缩软件。 7-Zip 26.02及之前版本存在处理逻辑错误漏洞，该漏洞源于提取特制RAR5归档时未能保留Web标记，允许攻击者绕过SmartScreen/MotW警告并篡改文件内容。
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
7-Zip 7-Zip 0 ~ 26.01 -

II. Public POCs for CVE-2026-58052

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III. Intelligence Information for CVE-2026-58052

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Vendor Advisories for CVE-2026-58052 (1)

Proof of Concept for CVE-2026-58052 (1)

Other References for CVE-2026-58052 (1)

IV. Related Vulnerabilities

Same product: 7-Zip
Same vendor: 7-Zip
Same weakness: CWE-693

V. Comments for CVE-2026-58052

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