Splunk Enterprise 10.0.0 < 10.0.4, 10.2.0 < 10.2.1 (SVD-2026-0305)

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

include('compat.inc');

if (description)
{
  script_id(301871);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/30");

  script_cve_id("CVE-2026-20166");
  script_xref(name:"IAVA", value:"2026-A-0241-S");

  script_name(english:"Splunk Enterprise 10.0.0 < 10.0.4, 10.2.0 < 10.2.1 (SVD-2026-0305)");

  script_set_attribute(attribute:"synopsis", value:
"An application running on a remote web server host is affected by a vulnerability");
  script_set_attribute(attribute:"description", value:
"The version of Splunk installed on the remote host is prior to tested version. It is, therefore, affected by a
vulnerability as referenced in the SVD-2026-0305 advisory.

  - In Splunk Enterprise versions below 10.2.1 and 10.0.4, and Splunk Cloud Platform versions below
    10.2.2510.5, 10.1.2507.16, and 10.0.2503.12, a low-privileged user that does not hold the admin or
    power Splunk roles could retrieve the Observability Cloud API access token through the Discover Splunk
    Observability Cloud app due to improper access control. This vulnerability does not affect Splunk
    Enterprise versions below 9.4.9 and 9.3.10 because the Discover Splunk Observability Cloud app does not
    come with Splunk Enterprise. (CVE-2026-20166)

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://advisory.splunk.com/advisories/SVD-2026-0305.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade Splunk Enterprise to versions 10.2.1, 10.0.4, or higher. Splunk is actively monitoring and patching Splunk Cloud
Platform instances. To eliminate further risk and help ensure a high level of security in your environment, you must
perform the following recommended actions after you upgrade Splunk Enterprise: Rotate the Observability API token
(Create and manage organization access tokens using Splunk Observability Cloud).");
  script_set_attribute(attribute:"agent", value:"all");
  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-2026-20166");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(200);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/03/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/03/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/11");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:splunk:splunk");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  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("splunkd_detect.nasl", "splunk_web_detect.nasl", "macos_splunk_installed.nbin", "splunk_win_installed.nbin", "splunk_nix_installed.nbin");
  script_require_keys("installed_sw/Splunk", "Settings/ParanoidReport");

  exit(0);
}

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

if (report_paranoia < 2) audit(AUDIT_PARANOID);

var app_info = vcf::splunk::get_app_info();

var constraints = [
  { 'min_version' : '10.0.0', 'fixed_version' : '10.0.4', 'license' : 'Enterprise' },
  { 'min_version' : '10.2.0', 'fixed_version' : '10.2.1', 'license' : 'Enterprise' }
];
vcf::splunk::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_WARNING
);