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.

The remote MiracleLinux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the AXSA:2026-1271:02 advisory.

    * 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)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the ALSA-2026:20568 advisory.

    * 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)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2026-20568 advisory.

    [8.2.0-5]
    - Remove the websocket plugin. Related: RHEL-168615

    [8.2.0-4]
    - Bump LZ4 Version to 1.10.2. Related: RHEL-135478

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote RockyLinux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RLSA-2026:20568 advisory.

    * lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing (CVE-2025-66566)

    * org.eclipse.jetty/jetty-http: HTTP request smuggling via chunked extension quoted-string parsing     (CVE-2026-2332)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:20568 advisory.

    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 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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:1871 advisory.

    Red Hat JBoss Enterprise Application Platform 8 is a platform for Java applications based on the WildFly     application runtime. This release of Red Hat JBoss Enterprise Application Platform 8.1.4 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 8.1.3, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 8.1.4 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * lz4-java: lz4-java: Out-of-bounds memory operations lead to denial of service and information disclosure     (CVE-2025-12183)

    * lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing (CVE-2025-66566)

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:1870 advisory.

    Red Hat JBoss Enterprise Application Platform 8 is a platform for Java applications based on the WildFly     application runtime. This release of Red Hat JBoss Enterprise Application Platform 8.1.4 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 8.1.3, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 8.1.4 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * lz4-java: lz4-java: Out-of-bounds memory operations lead to denial of service and information disclosure     (CVE-2025-12183)

    * lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing (CVE-2025-66566)

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:1823 advisory.

    JDK Mission Control (JMC) 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.

    Bug Fix(es) and Enhancement(s):

    * jmc: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing [rhel-9.4.z]     (JIRA:RHEL-135476)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of Oracle Essbase installed on the remote host is missing a security patch from the January 2026 Critical Patch Update (CPU). It is, therefore, affected by:

  - 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. (CVE-2025-66566)   Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote RockyLinux 9 host has a package installed that is affected by a vulnerability as referenced in the RLSA-2026:0752 advisory.

    * lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing (CVE-2025-66566)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 9 host has a package installed that is affected by a vulnerability as referenced in the ALSA-2026:0752 advisory.

    * lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing (CVE-2025-66566)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 9 host has a package installed that is affected by a vulnerability as referenced in the AXSA:2026-058:01 advisory.

    * lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing (CVE-2025-66566)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 9 host has a package installed that is affected by a vulnerability as referenced in the ELSA-2026-0752 advisory.

    [8.2.0-4]
    - Bump LZ4 Version to 1.10.2. Related: RHEL-135478

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:0751 advisory.

    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)

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:0752 advisory.

    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)

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

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

  - 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. (CVE-2025-66566)

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

  - 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. (CVE-2025-66566)

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

ID	Name	Product	Family	Severity
327472	MiracleLinux 9 : jmc-8.2.0-19.el9_8.2 (AXSA:2026-1271:02)	Nessus	Miracle Linux Local Security Checks	high
324821	AlmaLinux 9 : jmc (ALSA-2026:20568)	Nessus	Alma Linux Local Security Checks	high
322350	Oracle Linux 9 : jmc (ELSA-2026-20568)	Nessus	Oracle Linux Local Security Checks	high
318047	RockyLinux 9 : jmc (RLSA-2026:20568)	Nessus	Rocky Linux Local Security Checks	high
317002	RHEL 9 : jmc (RHSA-2026:20568)	Nessus	Red Hat Local Security Checks	high
297856	RHEL 9 : Red Hat JBoss Enterprise Application Platform 8.1.4 (RHSA-2026:1871)	Nessus	Red Hat Local Security Checks	high
297810	RHEL 8 : Red Hat JBoss Enterprise Application Platform 8.1.4 (RHSA-2026:1870)	Nessus	Red Hat Local Security Checks	high
297771	RHEL 9 : JMC update (Important) (RHSA-2026:1823)	Nessus	Red Hat Local Security Checks	high
296371	Oracle Essbase Information Disclosure Vulnerability (January 2026 CPU)	Nessus	Misc.	high
294844	RockyLinux 9 : jmc (RLSA-2026:0752)	Nessus	Rocky Linux Local Security Checks	high
294833	AlmaLinux 9 : jmc (ALSA-2026:0752)	Nessus	Alma Linux Local Security Checks	high
294821	MiracleLinux 9 : jmc-8.2.0-18.el9_7.2 (AXSA:2026-058:01)	Nessus	Miracle Linux Local Security Checks	high
291624	Oracle Linux 9 : jmc (ELSA-2026-0752)	Nessus	Oracle Linux Local Security Checks	high
291336	RHEL 9 : jmc (RHSA-2026:0751)	Nessus	Red Hat Local Security Checks	high
291327	RHEL 9 : jmc (RHSA-2026:0752)	Nessus	Red Hat Local Security Checks	high
436285	SCA: security update for at.yawk.lz4:lz4-java (GHSA-cmp6-m4wj-q63q)	Tenable Cloud Security	SCA Checks	high
436285	SCA: security update for at.yawk.lz4:lz4-java (GHSA-cmp6-m4wj-q63q)	Tenable Self-Hosted Container Security	SCA Checks	high
277643	Linux Distros Unpatched Vulnerability : CVE-2025-66566	Nessus	Misc.	high

Detections

Analytics

CVE-2025-66566

high

Tenable Plugins

high

high

high

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high

high

high

high

high

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high