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Linux Distros Unpatched Vulnerability : CVE-2026-88092

🗓️ 16 Oct 2026 00:00:00Reported by TenableType 
nessus
 nessus🔗 www.tenable.com👁 5 Views

Inconsistent interpretation of http requests in ASP.NET Core allows network tampering.

Related
Refs
Code
ReporterTitlePublishedViews
Family
alpinelinux
AlpineLinux		CVE-2026-88092
13 Oct 202619:01
–alpinelinux
circl
Circl		CVE-2026-88092
13 Oct 202611:49
–circl
cve
CVE		CVE-2026-88092
13 Oct 202619:01
–cve
cvelist
Cvelist		CVE-2026-88092 ASP.NET Core Tampering Vulnerability
13 Oct 202619:01
–cvelist
euvd
EUVD		EUVD-2026-100147
13 Oct 202619:01
–euvd
github
Github Security Blog		Microsoft Security Advisory CVE-2026-88092 - ASP.NET Core Security Feature Bypass Vulnerability
13 Oct 202620:40
–github
mskb
Microsoft KB		.NET 8.0 Update - October 13, 2026
13 Oct 202614:00
–mskb
mskb
Microsoft KB		.NET 9.0 Update - October 13, 2026
13 Oct 202614:00
–mskb
mskb
Microsoft KB		.NET 10.0 Update - October 13, 2026
13 Oct 202614:00
–mskb
mend
Mend		CVE-2026-88092
13 Oct 202619:01
–mend
Rows per page
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  - Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an
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}

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 = {
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    "package_manager": "rpm-list",
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          {"reference": "aspnetcore-runtime-dbg-8.0"},
          {"reference": "aspnetcore-runtime-dbg-9.0"},
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          {"reference": "aspnetcore-targeting-pack-8.0"},
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  "CentOS Linux-8": {
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          {"reference": "dotnet"},
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          {"reference": "dotnet-apphost-pack-8.0"},
          {"reference": "dotnet-apphost-pack-9.0"},
          {"reference": "dotnet-host"},
          {"reference": "dotnet-hostfxr-10.0"},
          {"reference": "dotnet-hostfxr-8.0"},
          {"reference": "dotnet-hostfxr-9.0"},
          {"reference": "dotnet-runtime-10.0"},
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      }
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  },
  "Red Hat Enterprise Linux-8": {
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          {"reference": "aspnetcore-targeting-pack-8.0"},
          {"reference": "aspnetcore-targeting-pack-9.0"},
          {"reference": "dotnet"},
          {"reference": "dotnet-apphost-pack-10.0"},
          {"reference": "dotnet-apphost-pack-8.0"},
          {"reference": "dotnet-apphost-pack-9.0"},
          {"reference": "dotnet-host"},
          {"reference": "dotnet-hostfxr-10.0"},
          {"reference": "dotnet-hostfxr-8.0"},
          {"reference": "dotnet-hostfxr-9.0"},
          {"reference": "dotnet-runtime-10.0"},
          {"reference": "dotnet-runtime-8.0"},
          {"reference": "dotnet-runtime-9.0"},
          {"reference": "dotnet-runtime-dbg-10.0"},
          {"reference": "dotnet-runtime-dbg-8.0"},
          {"reference": "dotnet-runtime-dbg-9.0"},
          {"reference": "dotnet-sdk-10.0"},
          {"reference": "dotnet-sdk-10.0-source-built-artifacts"},
          {"reference": "dotnet-sdk-8.0"},
          {"reference": "dotnet-sdk-8.0-source-built-artifacts"},
          {"reference": "dotnet-sdk-9.0"},
          {"reference": "dotnet-sdk-9.0-source-built-artifacts"},
          {"reference": "dotnet-sdk-aot-10.0"},
          {"reference": "dotnet-sdk-aot-9.0"},
          {"reference": "dotnet-sdk-dbg-10.0"},
          {"reference": "dotnet-sdk-dbg-8.0"},
          {"reference": "dotnet-sdk-dbg-9.0"},
          {"reference": "dotnet-targeting-pack-10.0"},
          {"reference": "dotnet-targeting-pack-8.0"},
          {"reference": "dotnet-targeting-pack-9.0"},
          {"reference": "dotnet-templates-10.0"},
          {"reference": "dotnet-templates-8.0"},
          {"reference": "dotnet-templates-9.0"},
          {"reference": "dotnet10.0"},
          {"reference": "dotnet8.0"},
          {"reference": "dotnet9.0"},
          {"reference": "netstandard-targeting-pack-2.1"}
        ]
      }
    ]
  }
};

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');
}

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19 Oct 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.19.4
EPSS0.00786
SSVC
ASP.NET Corehttp request/response smugglingtamperingnetwork
5