Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Lz4FrameDecoder allocates a ByteBuf of size decompressedLength (up to 32 MB per block) before LZ4 runs. A peer only needs a 21-byte header plus compressedLength payload bytes - 22 bytes if compressedLength == 1 - to force that allocation. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.

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

  - Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and
    4.1.133.Final, Lz4FrameDecoder allocates a ByteBuf of size decompressedLength (up to 32 MB per block)
    before LZ4 runs. A peer only needs a 21-byte header plus compressedLength payload bytes - 22 bytes if
    compressedLength == 1 - to force that allocation. This vulnerability is fixed in 4.2.13.Final and
    4.1.133.Final. (CVE-2026-42583)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:73644 advisory.

    Red Hat JBoss Enterprise Application Platform 7 is a platform for Java applications based on the WildFly     application runtime. This release of Red Hat JBoss Enterprise Application Platform 7.3.19 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 7.3.18, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 7.3.19 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * mchange-commons-java: mchange-commons-java: Arbitrary code execution via JNDI dereferencing of crafted     objects [eap-7.3.z] (CVE-2026-27727)

    * com.mchange/c3p0: c3p0: Arbitrary Code Execution via deserialization of crafted objects [eap-7.3.z]     (CVE-2026-27830)

    * netty-codec: Netty: Denial of Service via excessive memory allocation in LZ4FrameDecoder [eap-7.3.z]     (CVE-2026-42583)

    * netty-handler-proxy: Netty: HTTP Header Injection via HttpProxyHandler Disabled Validation [eap-7.3.z]     (CVE-2026-42578)

    * netty-codec-http: Netty: HTTP Request Smuggling due to improper handling of conflicting HTTP/1.0 headers     [eap-7.3.z] (CVE-2026-42581)

    * netty-codec-http: Netty: Request smuggling via malformed Transfer-Encoding parsing [eap-7.3.z]     (CVE-2026-42585)

    * netty-codec-http: Netty: Incorrect HTTP response parsing leads to data confusion [eap-7.3.z]     (CVE-2026-42584)

    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 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:73976 advisory.

    Red Hat JBoss Enterprise Application Platform 7 is a platform for Java applications based on the WildFly     application runtime. This release of Red Hat JBoss Enterprise Application Platform 7.1.16 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 7.1.15, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 7.1.16 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * mchange-commons-java: mchange-commons-java: Arbitrary code execution via     JNDI dereferencing of crafted objects [eap-7.1.z] (CVE-2026-27727)

    * com.mchange/c3p0: c3p0: Arbitrary Code Execution via deserialization of     crafted objects [eap-7.1.z] (CVE-2026-27830)

    * netty-codec: Netty: Denial of Service via excessive memory allocation in     LZ4FrameDecoder [eap-7.1.z] (CVE-2026-42583)

    * netty-handler-proxy: Netty: HTTP Header Injection via HttpProxyHandler Disabled Validation [eap-7.1.z]     (CVE-2026-42578)

    * netty-codec-http: Netty: HTTP Request Smuggling due to improper handling     of conflicting HTTP/1.0 headers [eap-7.1.z] (CVE-2026-42581)

    * netty-codec-http: Netty: Request smuggling via malformed     Transfer-Encoding parsing [eap-7.1.z] (CVE-2026-42585)

    * netty-codec-http: Netty: Incorrect HTTP response parsing leads to data     confusion [eap-7.1.z] (CVE-2026-42584)

    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 version of IBM Cognos Analytics installed on the remote host is 12.0.4 prior to 12.0.4 FP3, or 12.1.x prior to 12.1.3 FP2. It is, therefore, affected by multiple vulnerabilities as referenced in the IBM Security Bulletin No.
7287209:

  - NLTK versions 3.9.2 and prior are vulnerable to arbitrary code execution due to improper input     validation in the StanfordSegmenter module. The module dynamically loads external Java .jar files     without verification or sandboxing. An attacker can supply or replace the JAR file, enabling the     execution of arbitrary Java bytecode at import time. (CVE-2026-0848)

  - The lodash fix for CVE-2021-23337 added validation for the variable option in _.template but did not     apply the same validation to options.imports key names. Both paths flow into the same Function()     constructor sink. When an application passes untrusted input as options.imports key names, an attacker     can inject default-parameter expressions that execute arbitrary code at template compilation time.
    (CVE-2026-4800)

  - cryptography is a package designed to expose cryptographic primitives and recipes to Python developers.
    From 45.0.0 to before 46.0.7, if a non-contiguous buffer was passed to APIs which accepted Python     buffers (e.g. Hash.update()), this could lead to buffer overflows. (CVE-2026-39892)

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

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2308-1 advisory.

    This update for netty, netty-tcnative fixes the following issues

    - CVE-2026-41417: missing validations leads to HTTP request smuggling and RTSP request injection via     start-line       injection in `DefaultHttpRequest.setUri()` (bsc#1264350).
    - CVE-2026-42578: HTTP Header Injection via HttpProxyHandler Disabled Validation in Netty (bsc#1265243).
    - CVE-2026-42579: DNS codec does not enforce RFC 1035 domain name constraints during either encoding or     decoding       (bsc#1265272).
    - CVE-2026-42580: chunk size parser silently overflows int and enables request smuggling attacks     (bsc#1265273).
    - CVE-2026-42581: TE+CL header coexistence in HTTP/1.0 requests bypasses smuggling sanitization     (bsc#1265277).
    - CVE-2026-42583: resource exhaustion and possible denial of service via `Lz4FrameDecoder` (bsc#1265279).
    - CVE-2026-42584: improper handling of inbound responses in `HttpClientCodec` can lead to response     desynchronization       (bsc#1265280).
    - CVE-2026-42585: Netty is an asynchronous, event-driven network application framework (bsc#1265292).
    - CVE-2026-42586: CRLF Injection in Netty Redis Codec Encoder (bsc#1265245).
    - CVE-2026-42587: HttpContentDecompressor maxAllocation bypass via Content-Encoding: br/zstd/snappy     enables       decompression bomb DoS (bsc#1265246).
    - CVE-2026-44248: Netty is an asynchronous, event-driven network application framework (bsc#1265294).
    - CVE-2026-42582: HTTP/3 QPACK literal unbounded allocation (bsc#1265318).

    Changes for netty:

    - Upgrade to upstream version 4.1.133

Tenable has extracted the preceding description block directly from the SUSE 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and     4.1.133.Final, Lz4FrameDecoder allocates a ByteBuf of size decompressedLength (up to 32 MB per block)     before LZ4 runs. A peer only needs a 21-byte header plus compressedLength payload bytes - 22 bytes if     compressedLength == 1 - to force that allocation. This vulnerability is fixed in 4.2.13.Final and     4.1.133.Final. (CVE-2026-42583)

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

ID	Name	Product	Family	Type	Severity
463905	Echo: multiple io.netty:netty-codec packages: security update to 4.1.133.Final	Tenable Cloud Security	Echo Local Security Checks	Local	high
463905	Echo: multiple io.netty:netty-codec packages: security update to 4.1.133.Final	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
353413	RHEL 7 : Red Hat JBoss Enterprise Application Platform 7.3.19 Update (Important) (RHSA-2026:73644)	Nessus	Red Hat Local Security Checks	Local	high
351867	RHEL 7 : Red Hat JBoss Enterprise Application Platform 7.1.16 (RHSA-2026:73976)	Nessus	Red Hat Local Security Checks	Local	high
347960	IBM Cognos Analytics 12.0.4 < 12.0.4 FP3 / 12.1.x < 12.1.3 FP2 Multiple Vulnerabilities (7287209)	Nessus	CGI abuses	Remote	high
321020	SUSE SLED15 / SLES15 Security Update : netty, netty-tcnative (SUSE-SU-2026:2308-1)	Nessus	SuSE Local Security Checks	Local	medium
314798	Linux Distros Unpatched Vulnerability : CVE-2026-42583	Nessus	Misc.	Local	high
441343	SCA: security update for io.netty:netty-codec, io.netty:netty-codec-compression (GHSA-mj4r-2hfc-f8p6)	Tenable Cloud Security	SCA Checks	Local	high
441343	SCA: security update for io.netty:netty-codec, io.netty:netty-codec-compression (GHSA-mj4r-2hfc-f8p6)	Tenable Self-Hosted Container Security	SCA Checks	Local	high

Detections

Analytics

CVE-2026-42583

high

Tenable Plugins

high

high

high

high

high

medium

high

high

high