Kibana 8.x < 8.19.12 / 9.x < 9.2.6 / 9.3.x < 9.3.1 Missing Authorization (ESA-2026-19)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(303587);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/30");

  script_cve_id("CVE-2026-26939");
  script_xref(name:"IAVB", value:"2026-B-0074-S");

  script_name(english:"Kibana 8.x < 8.19.12 / 9.x < 9.2.6 / 9.3.x < 9.3.1 Missing Authorization (ESA-2026-19)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of Kibana installed on the remote host is prior to 8.19.12, 9.2.6, or 9.3.1. It is, therefore, affected
by a vulnerability as referenced in the ESA-2026-19 advisory.

  - Missing Authorization (CWE-862) in Kibana's server-side Detection Rule Management can lead to Unauthorized
    Endpoint Response Action Configuration (host isolation, process termination, and process suspension) via
    CAPEC-1 (Accessing Functionality Not Properly Constrained by ACLs). This requires an authenticated attacker
    with rule management privileges. (CVE-2026-26939)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://discuss.elastic.co/t/kibana-8-19-12-9-2-6-9-3-1-security-update-esa-2026-19/385530
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?00b447b6");
  script_set_attribute(attribute:"solution", value:
"Update to Kibana version 8.19.12, 9.2.6, 9.3.1 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:C/A:N");
  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:L/UI:N/S:U/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-26939");

  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:"2026/03/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/03/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/25");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:elasticsearch:kibana");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

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

  script_dependencies("kibana_web_detect.nbin");
  script_require_keys("installed_sw/Kibana");
  script_require_ports("Services/www", 5601);

  exit(0);
}

include('http.inc');
include('vcf.inc');

var app = 'Kibana';

get_install_count(app_name:'Kibana', exit_if_zero:TRUE);

var port = get_http_port(default:5601);

var app_info = vcf::get_app_info(app:app, port:port, webapp:TRUE);

var constraints = [
  { 'min_version' : '8.0.0',  'fixed_version' : '8.19.12' },
  { 'min_version' : '9.0.0',  'fixed_version' : '9.2.6' },
  { 'min_version' : '9.3.0',  'fixed_version' : '9.3.1' }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);