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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-85396)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-85396)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
474656	Chainguard: multiple logstash-9.4 packages: security update to 9.4.8-r0	Tenable Cloud Security	Chainguard Local Security Checks	Local	high
474656	Chainguard: multiple logstash-9.4 packages: security update to 9.4.8-r0	Tenable Self-Hosted Container Security	Chainguard Local Security Checks	Local	high
342729	Linux Distros Unpatched Vulnerability : CVE-2026-85396	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-85396

high

Tenable Plugins

high

high

high