Information Exposure Affecting logstash-8.17 package, versions <8.17.10-r18


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.07% (21st percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LOGSTASH817-15690932
  • published19 Mar 2026
  • disclosed5 Dec 2025

Introduced: 5 Dec 2025

CVE-2025-66566  (opens in a new tab)
CWE-201  (opens in a new tab)

How to fix?

Upgrade Chainguard logstash-8.17 to version 8.17.10-r18 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream logstash-8.17 package and not the logstash-8.17 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

yawkat LZ4 Java provides LZ4 compression for Java. Insufficient clearing of the output buffer in Java-based decompressor implementations in lz4-java 1.10.0 and earlier allows remote attackers to read previous buffer contents via crafted compressed input. In applications where the output buffer is reused without being cleared, this may lead to disclosure of sensitive data. JNI-based implementations are not affected. This vulnerability is fixed in 1.10.1.

CVSS Base Scores

version 3.1