Kibana 9.0.x < 9.4.9 / 9.5.x < 9.5.6 Incorrect Authorization (ESA-2026-203)

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

include('compat.inc');

if (description)
{
  script_id(375656);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/11/03");

  script_cve_id("CVE-2026-115292");

  script_name(english:"Kibana 9.0.x < 9.4.9 / 9.5.x < 9.5.6 Incorrect Authorization (ESA-2026-203)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by an incorrect authorization vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Kibana installed on the remote host is 9.0.x prior to 9.4.9, or 9.5.x prior to 9.5.6. It is, therefore,
affected by a vulnerability as referenced in the ESA-2026-203 advisory.

  - Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana Machine Learning can lead to
    information disclosure via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). An
    authenticated user with Machine Learning read access in one Kibana space can read the audit and error
    messages of data frame analytics jobs that belong to other spaces that the user is not authorized to
    access. These messages can include job details such as destination index names, analyzed field names, and
    failure information. (CVE-2026-115292)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://discuss.elastic.co/t/391357");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Kibana version 9.4.9, or 9.5.6 or later as appropriate for your release branch.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:N/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:L/I:N/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-2026-115292");

  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:"2026/11/03");
  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:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:elasticsearch:kibana");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  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('vcf.inc');
include('http.inc');

var app = 'Kibana';

get_install_count(app_name:app, 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' : '9.0.0', 'fixed_version' : '9.4.9' },
  { 'min_version' : '9.5.0', 'fixed_version' : '9.5.6' }
];

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