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RHEL 10 : tomcat9 (RHSA-2026:67163)

🗓️ 14 Sep 2026 00:00:00Reported by TenableType 
nessus
 nessus🔗 www.tenable.com👁 4 Views

Multiple auth bypass and input validation CVEs in RHEL 10 tomcat9 via tomcat-coyote and catalina.

Related
Refs
Code
ReporterTitlePublishedViews
Family
ibm
IBM Security Bulletins		Security Bulletin: Vulnerabilities in Apache Tomcat Server library (CVE-2026-41293, CVE-2026-24880) affect Power HMC.
1 Jul 202616:49
–ibm
ibm
IBM Security Bulletins		Security Bulletin: IBM Watson Discovery Cartridge affected by vulnerability in tomcat-embed-core-11.0.18.jar
13 May 202616:45
–ibm
ibm
IBM Security Bulletins		Security Bulletin: IBM Integration Bus for z/OS is vulnerable to multiple vulnerabilities due to Apache Tomcat
27 Jul 202613:24
–ibm
ibm
IBM Security Bulletins		Security Bulletin: IBM Integration Bus for z/OS is vulnerable to multiple vulnerabilities due to Apache Tomcat
14 May 202614:09
–ibm
ibm
IBM Security Bulletins		Security Bulletin: IBM Db2 Developer Extension is affected by vulnerability in tomcat-embed-core (CVE-2026-41284,CVE-2026-42498,CVE-2026-43514,CVE-2026-24880, CVE-2026-34483,CVE-2026-34487,CVE-2026-34500)
10 Aug 202613:55
–ibm
ibm
IBM Security Bulletins		Security Bulletin: IBM Watson Discovery Cartridge affected by vulnerabilities in tomcat-embed-core-11.0.20.jar
17 Jun 202615:33
–ibm
ibm
IBM Security Bulletins		Security Bulletin: Multiple vulnerabilities found in CICS Transaction Gateway for Multiplatforms.
9 Sep 202609:46
–ibm
ibm
IBM Security Bulletins		Security Bulletin: Maximo AI Service uses cryptography-46.0.6-cp311-abi3-manylinux_2_34_x86_64.whl and tomcat-embed-core-10.1.54.jar which are vulnerable to CVE-2026-39892, CVE-2026-41293, CVE-2026-43512, CVE-2026-43513 and CVE-2026-43515.
30 Jun 202607:44
–ibm
ibm
IBM Security Bulletins		Security Bulletin: Maximo AI Service uses multiple third party dependencies which are vulnerable to multiple CVEs.
27 Aug 202619:16
–ibm
ibm
IBM Security Bulletins		Security Bulletin: IBM Watson Speech Services Cartridge is vulnerable to multiple issues in tomcat-embed-core [CVE-2026-24880, CVE-2026-25854, CVE-2026-29129, CVE-2026-29145, CVE-2026-29146, CVE-2026-32990, CVE-2026-34483, CVE-2026-34487, CVE-2026-3450]
18 Jun 202619:57
–ibm
Rows per page
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##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2026:67163. The text
# itself is copyright (C) Red Hat, Inc.
##

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  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/14");

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    "CVE-2026-42498",
    "CVE-2026-43512",
    "CVE-2026-43513",
    "CVE-2026-43515",
    "CVE-2026-55957",
    "CVE-2026-59083",
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  script_set_attribute(attribute:"synopsis", value:
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  script_set_attribute(attribute:"description", value:
"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.");
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  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(178, 184, 201, 303, 305, 551, 807, 1188, 1286);
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      {'reference':'tomcat9-9.0.120-1.el10_0', 'sp':'0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat9-admin-webapps-9.0.120-1.el10_0', 'sp':'0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat9-docs-webapp-9.0.120-1.el10_0', 'sp':'0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat9-el-3.0-api-9.0.120-1.el10_0', 'sp':'0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat9-jsp-2.3-api-9.0.120-1.el10_0', 'sp':'0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat9-lib-9.0.120-1.el10_0', 'sp':'0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat9-servlet-4.0-api-9.0.120-1.el10_0', 'sp':'0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat9-webapps-9.0.120-1.el10_0', 'sp':'0', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'}
    ]
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var repo_relative_urls;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }

  if (!empty_or_null(constraint['repo_relative_urls'])) repo_relative_urls = constraint['repo_relative_urls'];

  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!exists_check || rpm_exists(rpm:exists_check))) &&
        rpm_check(sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}

if (flag)
{
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'tomcat9 / tomcat9-admin-webapps / tomcat9-docs-webapp / etc');
}

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14 Sep 2026 00:00Current
CVSS 3.19.8
EPSS0.02863
SSVC
tomcat9RHEL 10authentication bypassimproper input validationtomcat-coyotetomcat-catalinasecurity constraint bypass
4