Linux Distros Unpatched Vulnerability : CVE-2026-74990
| Reporter | Title | Published | Views | Family All 36 |
|---|---|---|---|---|
| CVE-2026-74990 | 18 Aug 202612:23 | – | alpinelinux | |
| CVE-2026-74990 | 18 Aug 202620:20 | – | circl | |
| CVE-2026-74990 | 18 Aug 202612:23 | – | cve | |
| CVE-2026-74990 Internally found bugs fixed in Thunderbird ESR 140.14, Thunderbird ESR 153.1 and Thunderbird 154 | 18 Aug 202612:23 | – | cvelist | |
| [SECURITY] [DSA 6451-1] firefox-esr security update | 19 Aug 202617:45 | – | debian | |
| CVE-2026-74990 | 18 Aug 202612:23 | – | debiancve | |
| Debian dsa-6451 : firefox-esr - security update | 19 Aug 202600:00 | – | nessus | |
| Mozilla Firefox ESR < 115.39 | 18 Aug 202600:00 | – | nessus | |
| Mozilla Firefox ESR < 140.14 | 18 Aug 202600:00 | – | nessus | |
| Mozilla Firefox ESR < 153.1 | 18 Aug 202600:00 | – | nessus |
10
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
include('compat.inc');
if (description)
{
script_id(337929);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/20");
script_cve_id("CVE-2026-74990");
script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-74990");
script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.
- Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 153. Some
of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that
with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154,
Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and
Thunderbird 153.1. (CVE-2026-74990)
Note that Nessus relies on the presence of the package as reported by the vendor.");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2026-74990");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-74990");
script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-74990");
script_set_attribute(attribute:"solution", value:
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script_set_attribute(attribute:"agent", value:"unix");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/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:U/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-74990");
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_unpatched", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2026/08/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/19");
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script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:7");
script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:8");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:14.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:10");
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script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:9");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mozjs102");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mozjs115");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mozjs38");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mozjs52");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mozjs68");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mozjs78");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mozjs91");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:thunderbird");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:firefox");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:firefox-x11");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:thunderbird");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:firefox-esr");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:thunderbird");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:firefox");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:firefox-x11");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:thunderbird");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Misc.");
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", "set_linux_os_id.nasl");
script_require_keys("Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched", "Host/OS/identifier");
script_require_ports("Host/OS/CentOS Linux-7", "Host/OS/CentOS Linux-8", "Host/OS/Debian Linux-11", "Host/OS/Debian Linux-12", "Host/OS/Debian Linux-13", "Host/OS/Debian Linux-14", "Host/OS/Red Hat Enterprise Linux-10", "Host/OS/Red Hat Enterprise Linux-7", "Host/OS/Red Hat Enterprise Linux-8", "Host/OS/Red Hat Enterprise Linux-9", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04", "Host/OS/Ubuntu Linux-22.04", "Host/OS/Ubuntu Linux-24.04");
exit(0);
}
if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/CentOS/rpm-list")) && empty_or_null(get_one_kb_item("Host/Debian/dpkg-l")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);
include('linux_unpatched.inc');
var distro_constraints_array = {
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"constraints": [
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{"reference": "thunderbird-l10n-is"},
{"reference": "thunderbird-l10n-it"},
{"reference": "thunderbird-l10n-ja"},
{"reference": "thunderbird-l10n-ka"},
{"reference": "thunderbird-l10n-kab"},
{"reference": "thunderbird-l10n-kk"},
{"reference": "thunderbird-l10n-ko"},
{"reference": "thunderbird-l10n-lt"},
{"reference": "thunderbird-l10n-lv"},
{"reference": "thunderbird-l10n-ms"}
]
}
]
},
"Ubuntu Linux-18.04": {
"package_manager": "dpkg-l",
"constraints": [
{
"release": "18.04",
"pkgs": [
{"reference": "libmozjs-52-0"},
{"reference": "libmozjs-52-dev"},
{"reference": "mozjs38"}
]
}
]
},
"Ubuntu Linux-20.04": {
"package_manager": "dpkg-l",
"constraints": [
{
"release": "20.04",
"pkgs": [
{"reference": "libmozjs-68-0"},
{"reference": "libmozjs-68-dev"},
{"reference": "mozjs52"}
]
}
]
},
"Ubuntu Linux-22.04": {
"package_manager": "dpkg-l",
"constraints": [
{
"release": "22.04",
"pkgs": [
{"reference": "libmozjs-91-0"},
{"reference": "libmozjs-91-dev"},
{"reference": "mozjs102"},
{"reference": "mozjs78"},
{"reference": "thunderbird"},
{"reference": "thunderbird-dbg"},
{"reference": "thunderbird-dev"},
{"reference": "thunderbird-gnome-support"},
{"reference": "thunderbird-gnome-support-dbg"},
{"reference": "thunderbird-locale-af"},
{"reference": "thunderbird-locale-ar"},
{"reference": "thunderbird-locale-ast"},
{"reference": "thunderbird-locale-be"},
{"reference": "thunderbird-locale-bg"},
{"reference": "thunderbird-locale-bn"},
{"reference": "thunderbird-locale-bn-bd"},
{"reference": "thunderbird-locale-br"},
{"reference": "thunderbird-locale-ca"},
{"reference": "thunderbird-locale-cak"},
{"reference": "thunderbird-locale-cs"},
{"reference": "thunderbird-locale-cy"},
{"reference": "thunderbird-locale-da"},
{"reference": "thunderbird-locale-de"},
{"reference": "thunderbird-locale-dsb"},
{"reference": "thunderbird-locale-el"},
{"reference": "thunderbird-locale-en-gb"},
{"reference": "thunderbird-locale-en-us"},
{"reference": "thunderbird-locale-es-ar"},
{"reference": "thunderbird-locale-es-es"},
{"reference": "thunderbird-locale-fy-nl"},
{"reference": "thunderbird-locale-ga-ie"},
{"reference": "thunderbird-locale-nb-no"},
{"reference": "thunderbird-locale-nn-no"},
{"reference": "thunderbird-locale-pa-in"},
{"reference": "thunderbird-locale-pt-br"},
{"reference": "thunderbird-locale-pt-pt"},
{"reference": "thunderbird-locale-sv-se"},
{"reference": "thunderbird-locale-ta-lk"},
{"reference": "thunderbird-locale-zh-cn"},
{"reference": "thunderbird-locale-zh-tw"},
{"reference": "thunderbird-mozsymbols"},
{"reference": "xul-ext-calendar-timezones"},
{"reference": "xul-ext-gdata-provider"},
{"reference": "xul-ext-lightning"}
]
}
]
},
"Ubuntu Linux-24.04": {
"package_manager": "dpkg-l",
"constraints": [
{
"release": "24.04",
"pkgs": [
{"reference": "libmozjs-115-0t64"},
{"reference": "libmozjs-115-dev"},
{"reference": "mozjs102"}
]
}
]
},
"CentOS Linux-8": {
"package_manager": "rpm-list",
"constraints": [
{
"release": "8",
"pkgs": [
{"reference": "firefox"},
{"reference": "thunderbird"}
]
}
]
},
"Red Hat Enterprise Linux-10": {
"package_manager": "rpm-list",
"constraints": [
{
"release": "10",
"pkgs": [
{"reference": "firefox"},
{"reference": "thunderbird"}
]
}
]
},
"Red Hat Enterprise Linux-8": {
"package_manager": "rpm-list",
"constraints": [
{
"release": "8",
"pkgs": [
{"reference": "firefox"},
{"reference": "thunderbird"}
]
}
]
},
"CentOS Linux-7": {
"package_manager": "rpm-list",
"constraints": [
{
"release": "7",
"pkgs": [
{"reference": "firefox"}
]
}
]
},
"Red Hat Enterprise Linux-7": {
"package_manager": "rpm-list",
"constraints": [
{
"release": "7",
"pkgs": [
{"reference": "firefox"}
]
}
]
},
"Red Hat Enterprise Linux-9": {
"package_manager": "rpm-list",
"constraints": [
{
"release": "9",
"pkgs": [
{"reference": "firefox"},
{"reference": "firefox-x11"},
{"reference": "thunderbird"}
]
}
]
}
};
var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var third_party_support = get_kb_item('Host/OS/extended-third-party');
if (!empty_or_null(third_party_support)) {
var third_party_vendors = distro_constraints_values['third_party'];
if (!empty_or_null(third_party_vendors)) {
var vendor;
foreach vendor (third_party_vendors) {
if (vendor == third_party_support) exit(0, 'A third party management patch is available for this vulnerability from ' + vendor + '.\n');
}
}
}
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);
if (!empty_or_null(report))
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : report
);
exit(0);
}
else
{
audit(AUDIT_HOST_NOT, 'affected');
}
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20 Aug 2026 00:00Current
5.6Medium risk
Vulners AI Score5.6
CVSS 3.19.8
EPSS0.00557
SSVC