CVE-2026-85396: rubyzip before 3.4.0 Path Traversal in Zip::Entry#extract via Sibling-Directory Prefix

Overview

Severity

High (CVSS 7.5)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-05

EPSS Score

0.38% (percentile: 31.5%)

Affected Products (1)

Other

• 21791-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-05: Information published.