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

What is CVE-2026-58052?

CVE-2026-58052 is a medium-severity vulnerability in 7-Zip, published on 28 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-693

Which versions are affected by CVE-2026-58052?

It affects 1 product.

Products include 7-Zip 7-Zip.

How do I fix CVE-2026-58052?

Upgrade to a fixed version.

Is CVE-2026-58052 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58052 exists.

Other vulnerabilities in 7-Zip

• CVE-2025-0411 7-Zip Mark of the Web Bypass Exploited High 7.0
• CVE-2008-6536 Other in n/a Critical 10.0
• CVE-2026-48095 GHSL-2026-140_7-Zip: 7-Zip has a heap buffer overflow via NTFS compressed stream buffer under-allocation High 8.8
• CVE-2018-10172 Privilege escalation in n/a High 8.8
• CVE-2016-2335 Memory corruption in n/a High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-58052, GHSA-fx33-p83c-vpr5, JLSEC-2026-1169, MINI-x8pg-5c25-pcmm, openSUSE-SU-2026:11777-1, openSUSE-SU-2026:11792-1.