JetBrains TeamCity < 2025.11.6 / 2026.1.x < 2026.1.2 Code Execution (CVE-2026-65906)

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

include('compat.inc');

if (description)
{
  script_id(344573);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/11");

  script_cve_id("CVE-2026-65906");
  script_xref(name:"IAVA", value:"2026-A-0686");

  script_name(english:"JetBrains TeamCity < 2025.11.6 / 2026.1.x < 2026.1.2 Code Execution (CVE-2026-65906)");

  script_set_attribute(attribute:"synopsis", value:
"The instance of JetBrains TeamCity installed on the remote host is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of JetBrains TeamCity installed on the remote host is prior to 2025.11.6, or version 2026.1 up to but
not including 2026.1.2. It is, therefore, affected by a vulnerability:

  - In JetBrains TeamCity before 2026.1.2, 2025.11.6 code execution via Kotlin DSL sandbox escape was
    possible (CVE-2026-65906)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://www.jetbrains.com/privacy-security/issues-fixed/?product=TeamCity&version=2026.1.2
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6dd8b7db");
  script_set_attribute(attribute:"solution", value:
"Upgrade to JetBrains TeamCity version 2025.11.6, 2026.1.2 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/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:C/C:H/I:H/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-2026-65906");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(94);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/07/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/10");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:jetbrains:teamcity");
  script_set_attribute(attribute:"generated_plugin", value:"former");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_set_attribute(attribute:"enable_cgi_scanning", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

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

  script_dependencies("jetbrains_teamcity_web_detect.nbin", "jetbrains_teamcity_win_installed.nbin", "jetbrains_teamcity_nix_installed.nbin");
  script_require_keys("installed_sw/JetBrains TeamCity");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {
    'spec_version': '1.0'
  },
  'checks': [
    {
      'product': {
        'name': 'JetBrains TeamCity',
        'type': 'app'
      },
      'check_algorithm': 'default',
      'constraints': [
        {
          'fixed_version': '2025.11.6'
        },
        {
          'min_version': '2026.1',
          'fixed_version': '2026.1.2'
        }
      ]
    }
  ]
};

var vdf_result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_HOLE);
vdf::handle_check_and_report_errors(vdf_result:vdf_result);