Directory Traversal Affecting logstash-9.4 package, versions <9.4.8-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.56% (45th percentile)

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  • Snyk IDSNYK-WOLFILATEST-LOGSTASH94-20939920
  • published15 Oct 2026
  • disclosed3 Sept 2026

Introduced: 3 Sep 2026

CVE-2026-85396  (opens in a new tab)
CWE-22  (opens in a new tab)

How to fix?

Upgrade Wolfi logstash-9.4 to version 9.4.8-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream logstash-9.4 package and not the logstash-9.4 package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1