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MiracleLinux 9 : firefox-140.17.0-1.el9_8.ML.1 (AXSA:2026-2049:27)

🗓️ 15 Oct 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 7 Views

Remote privilege escalation and sandbox escape in firefox and thunderbird.

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Refs
Code
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# Miracle Linux Security Advisory AXSA:2026-2049:27.
##

include('compat.inc');

if (description)
{
  script_id(366012);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/15");

  script_cve_id(
    "CVE-2026-92035",
    "CVE-2026-96869",
    "CVE-2026-100756",
    "CVE-2026-100757",
    "CVE-2026-100758",
    "CVE-2026-100759",
    "CVE-2026-100762",
    "CVE-2026-100766",
    "CVE-2026-100767",
    "CVE-2026-100769",
    "CVE-2026-100770",
    "CVE-2026-100771",
    "CVE-2026-100772",
    "CVE-2026-100773",
    "CVE-2026-100774",
    "CVE-2026-100775",
    "CVE-2026-100776",
    "CVE-2026-100777",
    "CVE-2026-100778",
    "CVE-2026-100779",
    "CVE-2026-100780",
    "CVE-2026-100781",
    "CVE-2026-100782",
    "CVE-2026-100783",
    "CVE-2026-100784",
    "CVE-2026-100785",
    "CVE-2026-100786",
    "CVE-2026-100788",
    "CVE-2026-100789",
    "CVE-2026-100790",
    "CVE-2026-100791",
    "CVE-2026-100792",
    "CVE-2026-100794",
    "CVE-2026-100797",
    "CVE-2026-100801",
    "CVE-2026-100803",
    "CVE-2026-100807",
    "CVE-2026-100811",
    "CVE-2026-100818",
    "CVE-2026-100819",
    "CVE-2026-100820",
    "CVE-2026-100821",
    "CVE-2026-100832"
  );

  script_name(english:"MiracleLinux 9 : firefox-140.17.0-1.el9_8.ML.1 (AXSA:2026-2049:27)");

  script_set_attribute(attribute:"synopsis", value:
"The remote MiracleLinux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
AXSA:2026-2049:27 advisory.

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Graphics component
    (CVE-2026-92035)
      * firefox: thunderbird: Use-after-free in the Graphics: Canvas2D component (CVE-2026-100832)
      * firefox: Use-after-free in the Layout: Text and Fonts component (CVE-2026-100784)
      * firefox: thunderbird: Privilege escalation in the DLL Services component (CVE-2026-100801)
      * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Internationalization
    component (CVE-2026-100794)
      * firefox: thunderbird: Privilege escalation in the Address Bar component (CVE-2026-100820)
      * firefox: thunderbird: Use-after-free in the Graphics: Canvas2D component (CVE-2026-100777)
      * firefox: thunderbird: Information disclosure in the Networking: JAR component (CVE-2026-100766)
      * firefox: thunderbird: Use-after-free in the XSLT component (CVE-2026-100779)
      * firefox: thunderbird: Privilege escalation in the DOM: Service Workers component (CVE-2026-100807)
      * firefox: thunderbird: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-100792)
      * firefox: Privilege escalation due to use-after-free in the Graphics: WebRender component
    (CVE-2026-100797)
      * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the XPCOM component
    (CVE-2026-100819)
      * firefox: thunderbird: Use-after-free in the JavaScript: WebAssembly component (CVE-2026-100776)
      * firefox: thunderbird: Use-after-free in the Widget component (CVE-2026-100757)
      * firefox: Sandbox escape due to use-after-free in the Graphics component (CVE-2026-100786)
      * firefox: thunderbird: Information disclosure in the Networking component (CVE-2026-96869)
      * firefox: Sandbox escape due to use-after-free in the DOM: Content Processes component
    (CVE-2026-100770)
      * firefox: thunderbird: Use-after-free in the JavaScript: WebAssembly component (CVE-2026-100769)
      * firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-100791)
      * firefox: thunderbird: Sandbox escape due to use-after-free in the Widget: Gtk component
    (CVE-2026-100818)
      * firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics
    component (CVE-2026-100782)
      * firefox: firefox: Sandbox escape via use-after-free in DOM component (CVE-2026-100811)
      * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-100772)
      * firefox: thunderbird: Uninitialized memory in the Storage: Quota Manager component (CVE-2026-100759)
      * firefox: Sandbox escape due to use-after-free in the DOM: Core & HTML component (CVE-2026-100778)
      * firefox: thunderbird: Sandbox escape in the DOM: Navigation component (CVE-2026-100758)
      * firefox: thunderbird: Sandbox escape in the Graphics component (CVE-2026-100775)
      * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender
    component (CVE-2026-100781)
      * firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-100774)
      * firefox: thunderbird: Same-origin policy bypass in the WebExtensions component (CVE-2026-100803)
      * firefox: thunderbird: Use-after-free in the Graphics: Canvas2D component (CVE-2026-100789)
      * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-100785)
      * firefox: thunderbird: Site isolation issue in the Panning and Zooming component (CVE-2026-100821)
      * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-100788)
      * firefox: thunderbird: Undefined behavior in the DOM: Streams component (CVE-2026-100771)
      * firefox: Sandbox escape due to use-after-free in the DOM: Content Processes component
    (CVE-2026-100762)
      * firefox: thunderbird: Use-after-free in the XSLT component (CVE-2026-100790)
      * firefox: thunderbird: Use-after-free in the Storage: IndexedDB component (CVE-2026-100773)
      * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-100780)
      * firefox: thunderbird: Use-after-free in the Networking: Cache component (CVE-2026-100767)
      * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component
    (CVE-2026-100756)
      * firefox: thunderbird: Uninitialized memory in the Audio/Video component (CVE-2026-100783)

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.");
  script_set_attribute(attribute:"see_also", value:"https://tsn.miraclelinux.com/en/node/24874");
  script_set_attribute(attribute:"solution", value:
"Update the affected firefox and / or firefox-x11 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-92035");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-100788");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_severity", value:"High");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:firefox");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:firefox-x11");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:miracle:linux:9");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Miracle Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/MiracleLinux/release", "Host/MiracleLinux/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm2.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'MIRACLE LINUX' >!< os_product) audit(AUDIT_OS_NOT, 'MIRACLE LINUX');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'MIRACLE LINUX');
if (! preg(pattern:"^9([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'MiracleLinux 9.x', 'MIRACLE LINUX ' + os_version);

if (!get_kb_item('Host/MiracleLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('aarch64' >!< cpu && 'ppc' >!< cpu && 's390' >!< cpu && 'x86_64' >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'MIRACLE LINUX', cpu);

var constraints = [
  {
    'release': '9',
    'pkgs': [
      {'reference':'firefox-140.17.0-1.el9_8.ML.1', 'cpu':'x86_64', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0', 'allowmaj':TRUE},
      {'reference':'firefox-x11-140.17.0-1.el9_8.ML.1', 'cpu':'x86_64', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0', 'allowmaj':TRUE}
    ]
  }
];

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 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;
  }
  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 &&
        ## (no known rpm to check OR known rpm_exists)
        (!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)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'firefox / firefox-x11');
}

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15 Oct 2026 00:00Current
8.6High risk
Vulners AI Score8.6
CVSS 3.19.8
EPSS0.00442
SSVC
7