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Linux Distros Unpatched Vulnerability : CVE-2026-6993

🗓️ 29 Apr 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 1 Views

Linux hosts with go-kratos up to 2.9.2 are vulnerable to CVE-2026-6993 and should apply the patch.

Related
Refs
Code
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-6993
25 Apr 202618:30
attackerkb
CNNVD
kratos 安全漏洞
25 Apr 202600:00
cnnvd
CVE
CVE-2026-6993
25 Apr 202618:30
cve
Cvelist
CVE-2026-6993 go-kratos http.DefaultServeMux Fallback server.go NewServer confused deputy
25 Apr 202618:30
cvelist
EUVD
EUVD-2026-25669
25 Apr 202618:30
euvd
Github Security Blog
Kratos has a Confused Deputy issue
25 Apr 202621:30
github
NVD
CVE-2026-6993
25 Apr 202619:16
nvd
OSV
GHSA-JJ45-XVQ5-RHH9 Kratos has a Confused Deputy issue
25 Apr 202621:30
osv
Positive Technologies
PT-2026-35166
25 Apr 202600:00
ptsecurity
RedhatCVE
CVE-2026-6993
28 Apr 202612:27
redhatcve
Rows per page
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

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  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-6993");

  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.

  - A security flaw has been discovered in go-kratos kratos up to 2.9.2. This impacts the function NewServer
    of the file transport/http/server.go of the component http.DefaultServeMux Fallback Handler. The
    manipulation results in unintended intermediary. The attack may be launched remotely. The exploit has been
    released to the public and may be used for attacks. The patch is identified as
    0284a5bcf92b5a7ee015300ce3051baf7ae4718d. Applying a patch is advised to resolve this issue.
    (CVE-2026-6993)

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-2026-6993");
  script_set_attribute(attribute:"solution", value:
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  script_set_attribute(attribute:"agent", value:"unix");
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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/CentOS Linux-7", "Host/OS/CentOS Linux-8", "Host/OS/Red Hat Enterprise Linux-10", "Host/OS/Red Hat Enterprise Linux-7", "Host/OS/Red Hat Enterprise Linux-8", "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/CentOS/rpm-list")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "buildah"},
          {"reference": "buildah-tests"},
          {"reference": "butane"},
          {"reference": "delve"},
          {"reference": "git-lfs"},
          {"reference": "go-fdo-client"},
          {"reference": "go-fdo-server"},
          {"reference": "go-toolset"},
          {"reference": "golang"},
          {"reference": "golang-bin"},
          {"reference": "golang-docs"},
          {"reference": "golang-github-openprinting-ipp-usb"},
          {"reference": "golang-misc"},
          {"reference": "golang-race"},
          {"reference": "golang-src"},
          {"reference": "golang-tests"},
          {"reference": "grafana"},
          {"reference": "grafana-pcp"},
          {"reference": "grafana-selinux"},
          {"reference": "gvisor-tap-vsock"},
          {"reference": "gvisor-tap-vsock-gvforwarder"},
          {"reference": "ignition"},
          {"reference": "ignition-edge"},
          {"reference": "ignition-grub"},
          {"reference": "ignition-validate"},
          {"reference": "image-builder"},
          {"reference": "ipp-usb"},
          {"reference": "opentelemetry-collector"},
          {"reference": "osbuild-composer"},
          {"reference": "osbuild-composer-core"},
          {"reference": "osbuild-composer-worker"},
          {"reference": "podman"},
          {"reference": "podman-docker"},
          {"reference": "podman-remote"},
          {"reference": "podman-tests"},
          {"reference": "rhc"},
          {"reference": "rhc-worker-playbook"},
          {"reference": "skopeo"},
          {"reference": "skopeo-tests"},
          {"reference": "toolbox"},
          {"reference": "toolbox-tests"},
          {"reference": "trustee"},
          {"reference": "trustee-guest-components"},
          {"reference": "yggdrasil"},
          {"reference": "yggdrasil-devel"}
        ]
      }
    ]
  },
  "CentOS Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "host-metering"},
          {"reference": "host-metering-selinux"},
          {"reference": "rhc"},
          {"reference": "rhc-worker-script"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "host-metering"},
          {"reference": "host-metering-selinux"},
          {"reference": "rhc"},
          {"reference": "rhc-worker-script"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "buildah"},
          {"reference": "buildah-tests"},
          {"reference": "conmon"},
          {"reference": "containernetworking-plugins"},
          {"reference": "containers-common"},
          {"reference": "git-lfs"},
          {"reference": "go-toolset"},
          {"reference": "golang"},
          {"reference": "golang-bin"},
          {"reference": "golang-docs"},
          {"reference": "golang-misc"},
          {"reference": "golang-race"},
          {"reference": "golang-src"},
          {"reference": "golang-tests"},
          {"reference": "grafana"},
          {"reference": "grafana-azure-monitor"},
          {"reference": "grafana-cloudwatch"},
          {"reference": "grafana-elasticsearch"},
          {"reference": "grafana-graphite"},
          {"reference": "grafana-influxdb"},
          {"reference": "grafana-loki"},
          {"reference": "grafana-mssql"},
          {"reference": "grafana-mysql"},
          {"reference": "grafana-opentsdb"},
          {"reference": "grafana-pcp"},
          {"reference": "grafana-postgres"},
          {"reference": "grafana-prometheus"},
          {"reference": "grafana-selinux"},
          {"reference": "grafana-stackdriver"},
          {"reference": "osbuild-composer"},
          {"reference": "osbuild-composer-core"},
          {"reference": "osbuild-composer-dnf-json"},
          {"reference": "osbuild-composer-worker"},
          {"reference": "podman"},
          {"reference": "podman-catatonit"},
          {"reference": "podman-docker"},
          {"reference": "podman-gvproxy"},
          {"reference": "podman-manpages"},
          {"reference": "podman-plugins"},
          {"reference": "podman-remote"},
          {"reference": "podman-tests"},
          {"reference": "rhc"},
          {"reference": "skopeo"},
          {"reference": "skopeo-tests"},
          {"reference": "toolbox"},
          {"reference": "toolbox-tests"},
          {"reference": "weldr-client"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "buildah"},
          {"reference": "buildah-tests"},
          {"reference": "conmon"},
          {"reference": "containernetworking-plugins"},
          {"reference": "containers-common"},
          {"reference": "git-lfs"},
          {"reference": "go-toolset"},
          {"reference": "golang"},
          {"reference": "golang-bin"},
          {"reference": "golang-docs"},
          {"reference": "golang-misc"},
          {"reference": "golang-race"},
          {"reference": "golang-src"},
          {"reference": "golang-tests"},
          {"reference": "grafana"},
          {"reference": "grafana-azure-monitor"},
          {"reference": "grafana-cloudwatch"},
          {"reference": "grafana-elasticsearch"},
          {"reference": "grafana-graphite"},
          {"reference": "grafana-influxdb"},
          {"reference": "grafana-loki"},
          {"reference": "grafana-mssql"},
          {"reference": "grafana-mysql"},
          {"reference": "grafana-opentsdb"},
          {"reference": "grafana-pcp"},
          {"reference": "grafana-postgres"},
          {"reference": "grafana-prometheus"},
          {"reference": "grafana-selinux"},
          {"reference": "grafana-stackdriver"},
          {"reference": "osbuild-composer"},
          {"reference": "osbuild-composer-core"},
          {"reference": "osbuild-composer-dnf-json"},
          {"reference": "osbuild-composer-worker"},
          {"reference": "podman"},
          {"reference": "podman-catatonit"},
          {"reference": "podman-docker"},
          {"reference": "podman-gvproxy"},
          {"reference": "podman-manpages"},
          {"reference": "podman-plugins"},
          {"reference": "podman-remote"},
          {"reference": "podman-tests"},
          {"reference": "rhc"},
          {"reference": "skopeo"},
          {"reference": "skopeo-tests"},
          {"reference": "toolbox"},
          {"reference": "toolbox-tests"},
          {"reference": "weldr-client"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "buildah"},
          {"reference": "buildah-tests"},
          {"reference": "butane"},
          {"reference": "conmon"},
          {"reference": "containernetworking-plugins"},
          {"reference": "git-lfs"},
          {"reference": "go-toolset"},
          {"reference": "golang"},
          {"reference": "golang-bin"},
          {"reference": "golang-docs"},
          {"reference": "golang-misc"},
          {"reference": "golang-race"},
          {"reference": "golang-src"},
          {"reference": "golang-tests"},
          {"reference": "grafana"},
          {"reference": "grafana-pcp"},
          {"reference": "grafana-selinux"},
          {"reference": "gvisor-tap-vsock"},
          {"reference": "gvisor-tap-vsock-gvforwarder"},
          {"reference": "ignition"},
          {"reference": "image-builder"},
          {"reference": "opentelemetry-collector"},
          {"reference": "osbuild-composer"},
          {"reference": "osbuild-composer-core"},
          {"reference": "osbuild-composer-dnf-json"},
          {"reference": "osbuild-composer-worker"},
          {"reference": "podman"},
          {"reference": "podman-catatonit"},
          {"reference": "podman-docker"},
          {"reference": "podman-gvproxy"},
          {"reference": "podman-plugins"},
          {"reference": "podman-remote"},
          {"reference": "podman-tests"},
          {"reference": "rhc"},
          {"reference": "rhc-devel"},
          {"reference": "skopeo"},
          {"reference": "skopeo-tests"},
          {"reference": "toolbox"},
          {"reference": "toolbox-tests"},
          {"reference": "trustee-guest-components"},
          {"reference": "weldr-client"}
        ]
      }
    ]
  }
};

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

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

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30 Apr 2026 00:00Current
5.5Medium risk
Vulners AI Score5.5
CVSS 25
CVSS 3.15.3
CVSS 46.9
CVSS 35.3
EPSS0.00051
SSVC
1