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OpenAdvisories
High ALSA-2026:20568 2 CVEs

Important: jmc security update

Published May 26, 2026 · Updated Oct 29, 2026

Summary

JDK Mission Control is a powerful profiler for HotSpot JVMs and has an advanced set of tools that enables efficient and detailed analysis of the extensive data collected by JDK Flight Recorder. The tool chain enables developers and administrators to collect and analyze data from Java applications running locally or deployed in production environments.

Security Fix(es):

* lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing (CVE-2025-66566)
* org.eclipse.jetty/jetty-[http:](http:) HTTP request smuggling via chunked extension quoted-string parsing (CVE-2026-2332)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 1

ReleasePackageFixed in
AlmaLinux · 9 jmc 8.2.0-19.el9_8.2

Vulnerabilities 2

  • High 8.2

    yawkat LZ4 Java has a possible information leak in Java safe decompressor

    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 a…

  • High 7.4
    CVE-2026-2332 Public exploit

    HTTP Request Smuggling via Chunked Extension Quoted-String Parsing

    In Eclipse Jetty, the HTTP/1.1 parser is vulnerable to request smuggling when chunk extensions are used, similar to the "funky chunks" techniques outlined here: * https://w4ke.info/2025/06/18/funky-chunks.html * https://w4ke.info/2025/10/29/funky-chunks-2.htm…

References

  • report
    https://access.redhat.com/security/cve/CVE-2025-66566
  • report
    https://access.redhat.com/security/cve/CVE-2026-2332
  • report
    https://bugzilla.redhat.com/2419500
  • report
    https://bugzilla.redhat.com/2458187
  • advisory
    https://errata.almalinux.org/9/ALSA-2026-20568.html