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

  - Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured     to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct     password. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36,     from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Users are     recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue. (CVE-2026-55957)

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

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:67164 advisory.

    Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies.

    Security Fix(es):

    * Apache Tomcat: Apache Tomcat: Improper Input Validation vulnerability due to incomplete fix     (CVE-2026-32990)

    * tomcat-coyote: Apache Tomcat: Authentication bypass via digest authentication (CVE-2026-43512)

    * tomcat-coyote: Apache Tomcat: HTTP/2 request headers not validated (CVE-2026-41293)

    * tomcat-coyote: Apache Tomcat: Information disclosure due to HTTP Authentication Header exposure during     WebSocket authentication. (CVE-2026-42498)

    * tomcat-coyote: tomcat: Improper Authorization allows security bypass (CVE-2026-43515)

    * tomcat-catalina: Apache Tomcat: Improper Handling of Case Sensitivity in LockOutRealm (CVE-2026-43513)

    * tomcat: Apache Tomcat: Authentication bypass via missing critical step in JNDIRealm GSSAPI configuration     (CVE-2026-55957)

    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 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:67163 advisory.

    Tomcat is the servlet container that is used in the official Reference Implementation for the Java Servlet     and JavaServer Pages technologies. The Java Servlet and JavaServer Pages specifications are developed by     Sun under the Java Community Process.  Tomcat is developed in an open and participatory environment and     released under the Apache Software License version 2.0. Tomcat is intended to be a collaboration of the     best-of-breed developers from around the world.

    Security Fix(es):

    * Apache Tomcat: Apache Tomcat: Improper Input Validation vulnerability due to incomplete fix     (CVE-2026-32990)

    * tomcat-coyote: Apache Tomcat: Authentication bypass via digest authentication (CVE-2026-43512)

    * tomcat-coyote: Apache Tomcat: HTTP/2 request headers not validated (CVE-2026-41293)

    * tomcat-coyote: Apache Tomcat: Information disclosure due to HTTP Authentication Header exposure during     WebSocket authentication. (CVE-2026-42498)

    * tomcat-coyote: tomcat: Improper Authorization allows security bypass (CVE-2026-43515)

    * tomcat-catalina: Apache Tomcat: Improper Handling of Case Sensitivity in LockOutRealm (CVE-2026-43513)

    * tomcat: Apache Tomcat: Authentication bypass via missing critical step in JNDIRealm GSSAPI configuration     (CVE-2026-55957)

    * tomcat: Apache Tomcat: Security constraint bypass via improper URL encoding in rewrite valve     (CVE-2026-59083)

    * tomcat: Apache Tomcat: Insufficient documentation for EncryptInterceptor may lead to insecure     configurations (CVE-2026-59084)

    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 CentOS Linux 6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS6:CLSA-2026:1786880926 advisory.

  - Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured     to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct     password. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36,     from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Users are     recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue. (CVE-2026-55957)

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 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:68677 advisory.

    Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies.

    Security Fix(es):

    * tomcat-coyote: Apache Tomcat: Authentication bypass via digest authentication (CVE-2026-43512)

    * tomcat-coyote: Apache Tomcat: HTTP/2 request headers not validated (CVE-2026-41293)

    * tomcat-coyote: Apache Tomcat: Information disclosure due to HTTP Authentication Header exposure during     WebSocket authentication. (CVE-2026-42498)

    * tomcat-coyote: tomcat: Improper Authorization allows security bypass (CVE-2026-43515)

    * tomcat-catalina: Apache Tomcat: Improper Handling of Case Sensitivity in LockOutRealm (CVE-2026-43513)

    * tomcat: Apache Tomcat: Authentication bypass via missing critical step in JNDIRealm GSSAPI configuration     (CVE-2026-55957)

    * tomcat: Apache Tomcat: Security constraint bypass via improper URL encoding in rewrite valve     (CVE-2026-59083)

    * tomcat: Apache Tomcat: Insufficient documentation for EncryptInterceptor may lead to insecure     configurations (CVE-2026-59084)

    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.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
324690	Linux Distros Unpatched Vulnerability : CVE-2026-55957	Nessus	Misc.	2026/7/2	2026/11/5	high
345583	RHEL 10 : tomcat (RHSA-2026:67164)	Nessus	Red Hat Local Security Checks	2026/9/14	2026/9/14	medium
345588	RHEL 10 : tomcat9 (RHSA-2026:67163)	Nessus	Red Hat Local Security Checks	2026/9/14	2026/9/14	medium
359859	CentOS Linux 6 [TuxCare] Security Update: tomcat6 / tomcat6-admin-webapps / tomcat6-docs-webapp / etc (CENTOS6:CLSA-2026:1786880926)	Nessus	CentOS Local Security Checks	2026/10/1	2026/10/1	high
346914	RHEL 8 : tomcat (RHSA-2026:68677)	Nessus	Red Hat Local Security Checks	2026/9/17	2026/9/17	critical

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