Linux Distros Unpatched Vulnerability : CVE-2026-110910

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

include('compat.inc');

if (description)
{
  script_id(373696);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/11/01");

  script_cve_id("CVE-2026-110910");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-110910");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - ### Summary `qs.stringify` with `allowEmptyArrays: true` writes the key of an empty array without encoding
    it, even though keys are encoded by default. A key that contains `&` (or the configured `delimiter`), `=`,
    or `#` therefore becomes query string syntax instead of data, so a caller-supplied key name can add
    parameters to the serialized query string, or cut it short. ### Details In `lib/stringify.js`, the
    `allowEmptyArrays` branch returns `adjustedPrefix + '[]'` early, before the code that passes every other
    key through `encoder` and `formatter`. So `{ x&k=v: [1] }` serializes as `x%26k%3Dv%5B0%5D=1`, but `{
    x&k=v: [] }` serializes as `x&k=v[]`. The early return applies at any depth (`{ a: { b&k=v: [] } }`
    gives `a[b&k=v][]`), under every `arrayFormat`, with `allowDots`, and with a custom `encoder`, which is
    never called for that key. With `encode: false` or `encodeValuesOnly: true`, keys are intentionally left
    unencoded on every path; those configurations are not affected. #### PoC ```js var qs = require(qs); var
    query = qs.stringify({ q: hi, x&apiKey=evil&y: [] }, { allowEmptyArrays: true }); //
    q=hi&x&apiKey=evil&y[] qs.parse(query); // { q: hi, x: , apiKey: evil, y: [] } qs.stringify({
    x#: [], z: 1 }, { allowEmptyArrays: true }); // x#[]&z=1: in a URL, everything after # becomes the
    fragment ``` #### Fix Applied in 234d505 on `main` and released as v6.17.0, and backported to v6.16.2,
    v6.15.4, v6.14.3, v6.13.4, and v6.12.6: the key of an empty array goes through `encoder` and `formatter`
    exactly as the key of any other value does, so `{ x&apiKey=evil&y: [] }` now serializes as
    `x%26apiKey%3Devil%26y[]`. Keys that need no encoding serialize as before, with two exceptions that match
    every other path: the brackets of a nested key are now encoded (`a[b][]` becomes `a%5Bb%5D[]`, which
    `qs.parse` reads identically), and with `encodeDotInKeys`, a dot in the key becomes `%252E` instead of
    `%2E` (which `decodeDotInKeys` previously misread as nesting). ### Affected versions - `>=6.12.0 <6.12.6`,
    fixed in v6.12.6 - `>=6.13.0 <6.13.4`, fixed in v6.13.4 - `>=6.14.0 <6.14.3`, fixed in v6.14.3 - `>=6.15.0
    <6.15.4`, fixed in v6.15.4 - `>=6.16.0 <6.16.2`, fixed in v6.16.2 v6.17.0 and later are not affected.
    `allowEmptyArrays` was introduced in f22b2bc and first shipped in v6.12.0, with this early return. Earlier
    versions have no `allowEmptyArrays` option and are not affected. ### Impact An application that passes an
    object whose key names come from untrusted input to `qs.stringify` with `allowEmptyArrays: true` (for
    example, to forward a parsed JSON body or user-selected fields to an upstream service) can have parameters
    injected into the resulting query string. The injected parameters are not keys of the object, so deleting
    or overwriting a key on the object (such as setting a trusted `apiKey` after copying the user's fields)
    does not remove them; whether the attacker's value or the application's wins depends on how the receiving
    side handles a duplicate parameter. A `#` in such a key ends the query string early when the result is
    placed in a URL. `allowEmptyArrays` is off by default, and only keys whose value (after any `filter`) is
    an empty array are affected. (CVE-2026-110910)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2026-110910");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-110910");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
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  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-110910");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/29");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:14.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:node-qs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:cockpit-ha-cluster");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grafana");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grafana-pcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grafana-selinux");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:linux-sgx");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:pcs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:pcs-snmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sgx-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sgx-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sgx-mpa");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sgx-pccs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sgx-pccs-admin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sgx-pckid-tool");
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  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("ssh_get_info2.nasl", "set_linux_os_id.nasl");
  script_require_keys("Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched", "Host/OS/identifier");
  script_require_ports("Host/OS/Debian Linux-12", "Host/OS/Debian Linux-13", "Host/OS/Debian Linux-14", "Host/OS/Red Hat Enterprise Linux-10", "Host/OS/Red Hat Enterprise Linux-9");

  exit(0);
}

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/Debian/dpkg-l")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Debian Linux-12": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "12",
        "pkgs": [
          {"reference": "node-qs"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "node-qs"}
        ]
      }
    ]
  },
  "Debian Linux-14": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14",
        "pkgs": [
          {"reference": "node-qs"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "cockpit-ha-cluster"},
          {"reference": "grafana"},
          {"reference": "grafana-pcp"},
          {"reference": "grafana-selinux"},
          {"reference": "linux-sgx"},
          {"reference": "pcs"},
          {"reference": "pcs-snmp"},
          {"reference": "sgx-common"},
          {"reference": "sgx-libs"},
          {"reference": "sgx-mpa"},
          {"reference": "sgx-pccs"},
          {"reference": "sgx-pccs-admin"},
          {"reference": "sgx-pckid-tool"},
          {"reference": "tdx-qgs"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "linux-sgx"},
          {"reference": "pcs"},
          {"reference": "pcs-snmp"},
          {"reference": "sgx-common"},
          {"reference": "sgx-libs"},
          {"reference": "sgx-mpa"},
          {"reference": "sgx-pccs"},
          {"reference": "sgx-pccs-admin"},
          {"reference": "sgx-pckid-tool"},
          {"reference": "tdx-qgs"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');

var third_party_support = get_kb_item('Host/OS/extended-third-party');
if (!empty_or_null(third_party_support)) {
    var third_party_vendors = distro_constraints_values['third_party'];
    if (!empty_or_null(third_party_vendors)) {
        var vendor;
        foreach vendor (third_party_vendors) {
            if (vendor == third_party_support) exit(0, 'A third party management patch is available for this vulnerability from ' + vendor + '.\n');
        }
    }
}

var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}