Logstash Logs Sensitive Information

HIGH 7.5CVE-2016-1000221 · GHSA-vcmm-ppqx-95ch · Published 16/06/2017 · updated 17/06/2026

In short

CVE-2016-1000221 is a HIGH (CVSS 7.5) vulnerability affecting logstash-core, logstash (elastic).
Chance of exploitation in the next 30 days (EPSS): 1.8%, higher than 78.3% of all vulnerabilities.
Fix: update to 2.3.4 or later.

Package	Affected versions	Patched versions
logstash-core RubyGems	`< 2.3.4`	`2.3.4`
logstash elastic	`≤ 2.3.3`	No fix yet

Logstash prior to version 2.3.4, Elasticsearch Output plugin would log to file HTTP authorization headers which could contain sensitive information.

NVD description

Logstash prior to version 2.3.4, Elasticsearch Output plugin would log to file HTTP authorization headers which could contain sensitive information.

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