Kibana 9.4.x < 9.4.3 Multiple Vulnerabilities (ESA-2026-54 / ESA-2026-58)

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

include('compat.inc');

if (description)
{
  script_id(330369);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/29");

  script_cve_id("CVE-2026-49092", "CVE-2026-56146");
  script_xref(name:"IAVB", value:"2026-B-0199");

  script_name(english:"Kibana 9.4.x < 9.4.3 Multiple Vulnerabilities (ESA-2026-54 / ESA-2026-58)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Kibana installed on the remote host is 9.4.x prior to 9.4.3. It is, therefore, affected by multiple
vulnerabilities as referenced in the ESA-2026-54 and ESA-2026-58 advisories.

  - Improper Access Control (CWE-284) in Kibana can lead to unauthorized modification of Entity Analytics
    Watchlist configuration and potential information disclosure. A low-privileged authenticated user with
    read-only Security Solution access could perform write operations on watchlist data that should require
    elevated privileges. Under specific deployment conditions, this could also allow such a user to access
    data beyond their authorized scope. (CVE-2026-56146)

  - Unintended Proxy or Intermediary ('Confused Deputy') (CWE-441) in Kibana can lead to unauthorized
    information exposure via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Under certain
    conditions, a lower-privileged user can cause data from sources they are not authorized to access to be
    processed using another user's privileges. (CVE-2026-49092)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported
version number.");
  # https://discuss.elastic.co/t/kibana-9-4-3-security-update-esa-2026-54/388553
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?72dd0d8a");
  # https://discuss.elastic.co/t/kibana-9-4-3-security-update-esa-2026-58/388557
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?44692516");
  script_set_attribute(attribute:"solution", value:
"Update to Kibana version 9.4.3 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/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:L/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-2026-56146");

  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:"2026/07/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/28");

  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: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' : '9.4.0', 'fixed_version' : '9.4.3' }
];

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