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Mozilla Firefox ESR < 115.32

🗓️ 14 Jan 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 2 Views

Firefox ESR versions before 115.32 on macOS are vulnerable to IPC use-after-free per mfsa2026-02.

Related
Refs
Code
ReporterTitlePublishedViews
Family
FreeBSD
Mozilla -- multiple vulnerabilities
13 Jan 202600:00
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ATTACKERKB
CVE-2026-0877
13 Jan 202613:30
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13 Jan 202613:30
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CVE-2026-0886
13 Jan 202613:30
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CVE-2026-0882
13 Jan 202613:30
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CVE-2026-0879
13 Jan 202613:30
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Amazon Linux 2023 : firefox (ALAS2023-2026-1429)
19 Feb 202600:00
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Amazon Linux 2 : thunderbird, --advisory ALAS2-2026-3167 (ALAS-2026-3167)
19 Feb 202600:00
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Amazon Linux 2 : firefox, --advisory ALAS2FIREFOX-2026-050 (ALASFIREFOX-2026-050)
19 Feb 202600:00
nessus
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AlmaLinux 8 : firefox (ALSA-2026:0667)
13 Feb 202600:00
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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 mfsa2026-02.
# The text itself is copyright (C) Mozilla Foundation.
##

include('compat.inc');

if (description)
{
  script_id(283704);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/09");

  script_cve_id(
    "CVE-2026-0877",
    "CVE-2026-0879",
    "CVE-2026-0880",
    "CVE-2026-0882",
    "CVE-2026-0886"
  );
  script_xref(name:"IAVA", value:"2026-A-0032-S");

  script_name(english:"Mozilla Firefox ESR < 115.32");

  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 115.32. It is, therefore, affected
by multiple vulnerabilities as referenced in the mfsa2026-02 advisory.

  - Use-after-free in the IPC component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32,
    Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7. (CVE-2026-0882)

  - Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability affects
    Firefox < 147, Firefox ESR < 115.32, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7.
    (CVE-2026-0879)

  - Mitigation bypass in the DOM: Security component. This vulnerability affects Firefox < 147, Firefox ESR <
    115.32, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7. (CVE-2026-0877)

  - Sandbox escape due to integer overflow in the Graphics component. This vulnerability affects Firefox <
    147, Firefox ESR < 115.32, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7.
    (CVE-2026-0880)

  - Incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 147, Firefox
    ESR < 115.32, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7. (CVE-2026-0886)

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/mfsa2026-02/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Mozilla Firefox ESR version 115.32 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-2026-0882");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-0879");

  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:"2026/01/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/01/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/14");

  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_set_attribute(attribute:"stig_severity", value:"I");
  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": "115.0.0",
          "fixed_version": "115.32"
        }
      ]
    }
  ]
};

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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09 Mar 2026 00:00Current
7.4High risk
Vulners AI Score7.4
CVSS 3.19.8
EPSS0.0055
SSVC
2