RHEL 9 : cockpit (RHSA-2026:94533)
10
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2026:94533. The text
# itself is copyright (C) Red Hat, Inc.
##
include('compat.inc');
if (description)
{
script_id(375678);
script_version("1.1");
script_set_attribute(attribute:"plugin_modification_date", value:"2026/11/03");
script_cve_id("CVE-2026-76235", "CVE-2026-91147", "CVE-2026-91149");
script_xref(name:"RHSA", value:"2026:94533");
script_name(english:"RHEL 9 : cockpit (RHSA-2026:94533)");
script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for cockpit.");
script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2026:94533 advisory.
Cockpit enables users to administer GNU/Linux servers using a web browser. It offers network
configuration, log inspection, diagnostic reports, SELinux troubleshooting, interactive command-line
sessions, and more.
Security Fix(es):
* cockpit: Cockpit: Denial of Service in `cockpit-ws` due to URL-root handling without a trailing slash
(CVE-2026-91147)
* cockpit: Cockpit: Denial of Service via unbounded connection thread spawning (CVE-2026-91149)
* cockpit-ws: cockpit: cockpit-ws: unauthenticated remote memory leak via CockpitLang cookie in
send_login_html (CVE-2026-76235)
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.");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#important");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2479230");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2479422");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2519497");
# https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_94533.json
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3ed286b0");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2026:94533");
script_set_attribute(attribute:"solution", value:
"Update the RHEL cockpit package based on the guidance in RHSA-2026:94533.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:N/I:N/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-2026-91149");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_cwe_id(401, 617, 770);
script_set_attribute(attribute:"vendor_severity", value:"Important");
script_set_attribute(attribute:"vuln_publication_date", value:"2026/08/19");
script_set_attribute(attribute:"patch_publication_date", value:"2026/11/03");
script_set_attribute(attribute:"plugin_publication_date", value:"2026/11/03");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:9");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_eus:9.8");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:cockpit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:cockpit-bridge");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:cockpit-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:cockpit-packagekit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:cockpit-storaged");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:cockpit-system");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:cockpit-ws");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:cockpit-ws-selinux");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Red Hat 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", "redhat_repos.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");
exit(0);
}
include('rpm2.inc');
include('rhel.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) || 'Red Hat' >!< os_product) audit(AUDIT_OS_NOT, 'Red Hat');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
if (!rhel_check_release_list(operator: 'ge', os_version: os_version, rhel_versions: ['9','9.8'])) audit(AUDIT_OS_NOT, 'Red Hat 9.x', 'Red Hat ' + os_version);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);
var constraints = [
{
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],
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]
},
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'content/e4s/rhel9/9.8/x86_64/baseos/source/SRPMS',
'content/e4s/rhel9/rhui/9.8/x86_64/baseos/os',
'content/e6s/rhel9/9.8/aarch64/baseos/debug',
'content/e6s/rhel9/9.8/aarch64/baseos/os',
'content/e6s/rhel9/9.8/aarch64/baseos/source/SRPMS',
'content/e6s/rhel9/9.8/ppc64le/baseos/debug',
'content/e6s/rhel9/9.8/ppc64le/baseos/os',
'content/e6s/rhel9/9.8/ppc64le/baseos/source/SRPMS',
'content/e6s/rhel9/9.8/s390x/baseos/debug',
'content/e6s/rhel9/9.8/s390x/baseos/os',
'content/e6s/rhel9/9.8/s390x/baseos/source/SRPMS',
'content/e6s/rhel9/9.8/x86_64/baseos/debug',
'content/e6s/rhel9/9.8/x86_64/baseos/os',
'content/e6s/rhel9/9.8/x86_64/baseos/source/SRPMS',
'content/eus/rhel9/9.8/aarch64/baseos/debug',
'content/eus/rhel9/9.8/aarch64/baseos/os',
'content/eus/rhel9/9.8/aarch64/baseos/source/SRPMS',
'content/eus/rhel9/9.8/ppc64le/baseos/debug',
'content/eus/rhel9/9.8/ppc64le/baseos/os',
'content/eus/rhel9/9.8/ppc64le/baseos/source/SRPMS',
'content/eus/rhel9/9.8/s390x/baseos/debug',
'content/eus/rhel9/9.8/s390x/baseos/os',
'content/eus/rhel9/9.8/s390x/baseos/source/SRPMS',
'content/eus/rhel9/9.8/x86_64/baseos/debug',
'content/eus/rhel9/9.8/x86_64/baseos/os',
'content/eus/rhel9/9.8/x86_64/baseos/source/SRPMS',
'content/eus/rhel9/rhui/9.8/x86_64/baseos/os'
],
'pkgs': [
{'reference':'cockpit-356.4-1.el9_8', 'sp':'8', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
{'reference':'cockpit-bridge-356.4-1.el9_8', 'sp':'8', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
{'reference':'cockpit-doc-356.4-1.el9_8', 'sp':'8', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
{'reference':'cockpit-system-356.4-1.el9_8', 'sp':'8', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
{'reference':'cockpit-ws-356.4-1.el9_8', 'sp':'8', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
{'reference':'cockpit-ws-selinux-356.4-1.el9_8', 'sp':'8', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE}
]
}
];
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, 'cockpit / cockpit-bridge / cockpit-doc / cockpit-packagekit / etc');
}
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03 Nov 2026 00:00Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.17.5
EPSS0.00641
SSVC