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

  - A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Java     applications. The Undertow library fails to properly validate the Host header in incoming HTTP requests.As     a result, requests containing malformed or malicious Host headers are processed without rejection,     enabling attackers to poison caches, perform internal network scans, or hijack user sessions.
    (CVE-2025-12543)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:4916 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 7.4.24 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 7.4.23, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 7.4.24 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * jackson-core: jackson-core Potential StackoverflowError (CVE-2025-52999)

    * undertow-core: Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache     Poisoning and SSRF [eap-7.4.z] (CVE-2025-12543)

    * cxf: CXF JMS Code Execution Vulnerability [eap-7.4.z] (CVE-2025-48913)

    * netty-codec-http2: Netty MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-55163)

    * org.eclipse.jgit: XXE vulnerability in Eclipse JGit [eap-7.4.z] (CVE-2025-4949)

    * hibernate-core: Hibernate: Information disclosure and data deletion via second-order SQL injection     [eap-7.4.z] (CVE-2026-0603)

    * com.google.protobuf/protobuf-java: StackOverflow vulnerability in Protocol Buffers (CVE-2024-7254)

    * undertow: OutOfMemory when parsing form data encoding with application/x-www-form-urlencoded [eap-7.4.z]     (CVE-2024-3884)

    * undertow-core: Undertow MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-9784)

    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-2026:4915 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 7.4.24 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 7.4.23, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 7.4.24 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * jackson-core: jackson-core Potential StackoverflowError (CVE-2025-52999)

    * undertow-core: Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache     Poisoning and SSRF [eap-7.4.z] (CVE-2025-12543)

    * cxf: CXF JMS Code Execution Vulnerability [eap-7.4.z] (CVE-2025-48913)

    * netty-codec-http2: Netty MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-55163)

    * org.eclipse.jgit: XXE vulnerability in Eclipse JGit [eap-7.4.z] (CVE-2025-4949)

    * hibernate-core: Hibernate: Information disclosure and data deletion via second-order SQL injection     [eap-7.4.z] (CVE-2026-0603)

    * com.google.protobuf/protobuf-java: StackOverflow vulnerability in Protocol Buffers (CVE-2024-7254)

    * undertow: OutOfMemory when parsing form data encoding with application/x-www-form-urlencoded [eap-7.4.z]     (CVE-2024-3884)

    * undertow-core: Undertow MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-9784)

    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-2026:0384 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 8.1.3 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 8.1.2, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 8.1.3 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * undertow-core: Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache     Poisoning and SSRF [eap-8.1.z] (CVE-2025-12543)

    * undertow: OutOfMemory when parsing form data encoding with application/x-www-form-urlencoded [eap-8.1.z]     (CVE-2024-3884)

    * undertow-core: Undertow MadeYouReset HTTP/2 DDoS Vulnerability [eap-8.1.z] (CVE-2025-9784)

    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-2026:3889 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 8.0.12 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 8.0.11, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 8.0.12 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * undertow-core: Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache     Poisoning and SSRF [eap-8.0.z] (CVE-2025-12543)

    * undertow-core: Undertow MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-9784)

    * undertow: OutOfMemory when parsing form data encoding with     application/x-www-form-urlencoded [eap-8.0.z] (CVE-2024-3884)

    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-2026:0383 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 8.1.3 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 8.1.2, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 8.1.3 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * undertow-core: Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache     Poisoning and SSRF [eap-8.1.z] (CVE-2025-12543)

    * undertow: OutOfMemory when parsing form data encoding with application/x-www-form-urlencoded [eap-8.1.z]     (CVE-2024-3884)

    * undertow-core: Undertow MadeYouReset HTTP/2 DDoS Vulnerability [eap-8.1.z] (CVE-2025-9784)

    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-2026:3891 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 8.0.12 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 8.0.11, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 8.0.12 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * undertow-core: Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache     Poisoning and SSRF [eap-8.0.z] (CVE-2025-12543)

    * undertow-core: Undertow MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-9784)

    * undertow: OutOfMemory when parsing form data encoding with application/x-www-form-urlencoded [eap-8.0.z]     (CVE-2024-3884)

    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-2026:4917 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 7.4.24 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 7.4.23, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 7.4.24 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * jackson-core: jackson-core Potential StackoverflowError (CVE-2025-52999)

    * undertow-core: Undertow HTTP Server Fails to Reject Malformed Host Headers Leading to Potential Cache     Poisoning and SSRF [eap-7.4.z] (CVE-2025-12543)

    * cxf: CXF JMS Code Execution Vulnerability [eap-7.4.z] (CVE-2025-48913)

    * netty-codec-http2: Netty MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-55163)

    * org.eclipse.jgit: XXE vulnerability in Eclipse JGit [eap-7.4.z] (CVE-2025-4949)

    * hibernate-core: Hibernate: Information disclosure and data deletion via second-order SQL injection     [eap-7.4.z] (CVE-2026-0603)

    * com.google.protobuf/protobuf-java: StackOverflow vulnerability in Protocol Buffers (CVE-2024-7254)

    * undertow: OutOfMemory when parsing form data encoding with application/x-www-form-urlencoded [eap-7.4.z]     (CVE-2024-3884)

    * undertow-core: Undertow MadeYouReset HTTP/2 DDoS Vulnerability (CVE-2025-9784)

    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 Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-8144-1 advisory.

    It was discovered that Undertow incorrectly validated the Host header in incoming HTTP requests. A remote     attacker could possibly use this issue to gain unintended access to user sessions.

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

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

ID	Name	Product	Family	Published	Updated	Severity
282346	Linux Distros Unpatched Vulnerability : CVE-2025-12543	Nessus	Misc.	1/7/2026	4/4/2026	critical
302900	RHEL 8 : Red Hat JBoss Enterprise Application Platform 7.4.24 (RHSA-2026:4916)	Nessus	Red Hat Local Security Checks	3/18/2026	3/18/2026	high
302898	RHEL 7 : Red Hat JBoss Enterprise Application Platform 7.4.24 (RHSA-2026:4915)	Nessus	Red Hat Local Security Checks	3/18/2026	3/18/2026	high
283521	RHEL 9 : Red Hat JBoss Enterprise Application Platform 8.1.3 (RHSA-2026:0384)	Nessus	Red Hat Local Security Checks	1/13/2026	3/17/2026	critical
301159	RHEL 8 : Red Hat JBoss Enterprise Application Platform 8.0.12 (RHSA-2026:3889)	Nessus	Red Hat Local Security Checks	3/6/2026	3/16/2026	critical
283525	RHEL 8 : Red Hat JBoss Enterprise Application Platform 8.1.3 (RHSA-2026:0383)	Nessus	Red Hat Local Security Checks	1/13/2026	3/17/2026	critical
301160	RHEL 9 : Red Hat JBoss Enterprise Application Platform 8.0.12 (RHSA-2026:3891)	Nessus	Red Hat Local Security Checks	3/6/2026	3/16/2026	critical
302899	RHEL 9 : Red Hat JBoss Enterprise Application Platform 7.4.24 (RHSA-2026:4917)	Nessus	Red Hat Local Security Checks	3/18/2026	3/18/2026	high
304786	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : Undertow vulnerability (USN-8144-1)	Nessus	Ubuntu Local Security Checks	4/3/2026	4/3/2026	critical

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