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Mozilla Firefox ESR < 140.10.1

🗓️ 29 Apr 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 4 Views

Firefox ESR before 140.10.1 on macOS has sandbox escape, information disclosure, and memory bugs.

Related
Refs
Code
ReporterTitlePublishedViews
Family
FreeBSD
firefox -- Information disclosure
28 Apr 202600:00
freebsd
FreeBSD
firefox -- Information disclosure
28 Apr 202600:00
freebsd
FreeBSD
firefox -- Memory safety bugs
28 Apr 202600:00
freebsd
FreeBSD
Mozilla -- Incorrect boundary conditions
7 May 202600:00
freebsd
FreeBSD
Mozilla -- Sandbox escape
28 Apr 202600:00
freebsd
FreeBSD
Mozilla -- Memory safety bugs
28 Apr 202600:00
freebsd
ATTACKERKB
CVE-2026-7320
28 Apr 202613:49
attackerkb
ATTACKERKB
CVE-2026-8091
7 May 202612:45
attackerkb
ATTACKERKB
CVE-2026-7323
28 Apr 202613:49
attackerkb
ATTACKERKB
CVE-2026-7322
28 Apr 202613:49
attackerkb
Rows per page
#%NASL_MIN_LEVEL 80900
## 
# (C) Tenable, Inc.
#                                  
# The descriptive text and package checks in this plugin were
# extracted from Mozilla Foundation Security Advisory mfsa2026-36.
# The text itself is copyright (C) Mozilla Foundation.
##

include('compat.inc');

if (description)
{
  script_id(310800);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/13");

  script_cve_id(
    "CVE-2026-7320",
    "CVE-2026-7321",
    "CVE-2026-7322",
    "CVE-2026-7323",
    "CVE-2026-8091"
  );

  script_name(english:"Mozilla Firefox ESR < 140.10.1");

  script_set_attribute(attribute:"synopsis", value:
"A web browser installed on the remote macOS or Mac OS X host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Firefox ESR installed on the remote macOS or Mac OS X host is prior to 140.10.1. It is, therefore,
affected by multiple vulnerabilities as referenced in the mfsa2026-36 advisory.

  - Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This
    vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Thunderbird 140.10.1.
    (CVE-2026-7321)

  - Information disclosure due to incorrect boundary conditions in the Audio/Video component. This
    vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Firefox ESR 115.35.1, Thunderbird
    150.0.1, and Thunderbird 140.10.1. (CVE-2026-7320)

  - Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in
    Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, Thunderbird 140.10.1, and Firefox ESR 115.35.2.
    (CVE-2026-8091)

  - Memory safety bugs present in Firefox ESR 115.35.0, Firefox ESR 140.10.0 and Firefox 150.0.0. Some of
    these bugs showed evidence of memory corruption and we presume that with enough effort some of these could
    have been exploited to run arbitrary code. (CVE-2026-7322)

  - Memory safety bugs present in Firefox ESR 140.10.0 and Firefox 150.0.0. Some of these bugs showed evidence
    of memory corruption and we presume that with enough effort some of these could have been exploited to run
    arbitrary code. (CVE-2026-7323)

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://www.mozilla.org/en-US/security/advisories/mfsa2026-36/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Mozilla Firefox ESR version 140.10.1 or later.");
  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-2026-7321");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-8091");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/04/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/04/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/29");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:mozilla:firefox_esr");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"MacOS X Local Security Checks");

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

  script_dependencies("macosx_firefox_installed.nasl");
  script_require_keys("installed_sw/Mozilla Firefox ESR");

  exit(0);
}

include('vdf.inc');

# @tvdl-content-verify-only
var vuln_data = {
  "metadata": {
    "spec_version": "1.0"
  },
  "requires": [
    {
      "scope": "target",
      "match": {
        "os": "macos"
      }
    }
  ],
  "checks": [
    {
      "product": {
        "name": "Mozilla Firefox ESR",
        "type": "app"
      },
      "check_algorithm": "default",
      "constraints": [
        {
          "min_version": "140.0.0",
          "fixed_version": "140.10.1"
        }
      ]
    }
  ]
};

var vdf_result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_HOLE);
vdf::handle_check_and_report_errors(vdf_result:vdf_result);

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13 May 2026 00:00Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.19.8
EPSS0.00439
SSVC
4