p7zip: 7-Zip for Windows through 26.01 fails to preserve the Mark-of-the-Web when extracting a crafted RAR5 archive, because...
CVE-2026-58052 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-58052, released July 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| 7zip · Debian 14 | 26.03+dfsg-1 | DEBIAN-CVE-2026-58052 | Jul 14, 2026 |
| p7zip · Debian 13.5 (trixie) | 16.02+transitional.1 | DEBIAN-CVE-2026-58052 | Jul 14, 2026 |
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