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VULNERABILITIES

CVE-2026-85396 Details

Description

rubyzip versions before 3.4.0 contain a path traversal vulnerability in Zip::Entry#extract that fails to properly validate extraction paths using prefix comparison without trailing separators. Attackers can craft archive entries with names like ../upload_backup/owned.sh to write files outside the intended extraction directory into sibling paths sharing the destination prefix.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://github.com/geo-chen/oss/blob/main/rubyzip.md [email protected]
https://github.com/rubyzip/rubyzip [email protected]
https://github.com/rubyzip/rubyzip/blob/v3.3.1/lib/zip/entry.rb [email protected]
https://github.com/rubyzip/rubyzip/commit/17edfbf4423b83211b075acc23a7d8640da63449 [email protected]
https://github.com/rubyzip/rubyzip/releases/tag/v3.4.0 [email protected]

see all 6 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-85396
NVD Published Date:
Sep 3, 2026
NVD Last Modified:
Sep 24, 2026
Source:
[email protected]
CVE-2026-85396 Details - Not Deferred