CVE-2026-54772: CoreWCF Pre-authentication Infinite-loop CPU Exhaustion Vulnerability

HIGH
Advisory Identifier: GHSA-p86g-xrr2-pf7c
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CVSS 7.5
CWE-400 CWE-835
Published
Advisory Summary

CVE-2026-54772 is a HIGH (CVSS 7.5) pre-authentication infinite-loop cpu exhaustion vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting CoreWCF libraries in the NuGet ecosystem. The issue involves pre-authentication infinite-loop cpu exhaustion in corewcf net.tcp / net.pipe / net.uds framing handshake. Remediation is available by upgrading affected packages to version 1.8.1, 1.9.1.

CVE-2026-54772 at a Glance

CVE Identifier CVE-2026-54772
GHSA Identifier GHSA-p86g-xrr2-pf7c
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product CoreWCF
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-54772

To remediate this vulnerability, upgrade all affected CoreWCF dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

CoreWCF.NetFramingBase fixed: 1.8.1 
Upgrade CoreWCF.NetFramingBase to 1.8.1
CoreWCF.NetFramingBase fixed: 1.9.1 
Upgrade CoreWCF.NetFramingBase to 1.9.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for CoreWCF.NetFramingBase

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-54772, inspect your project dependencies for CoreWCF:

inspect dependencies for CoreWCF.NetFramingBase

Analyze the terminal output to locate any version of CoreWCF in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.8.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In CoreWCF, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact An unauthenticated remote attacker can pin one server thread‑pool worker at 100 % CPU per connection. With a few connections, the CPU usage can be exhausted. #### Preconditions An attacker being able to reach a service which is exposing an endpoint using one of NetTcpBinding, NetNamedPipeBinding, or UnixDomainSocketBinding. ### Patches Fixed in CoreWCF v1.8.1 and v1.9.1 ### Workarounds None

CVE-2026-54772 Affected CoreWCF Versions

2 component(s)
Fixed Versions:
1.8.11.9.1
Product / Package Ecosystem Affected Versions Fixed Version
CoreWCF.NetFramingBase
nuget/CoreWCF.NetFramingBase
NuGet
< 1.8.1
1.8.1
CoreWCF.NetFramingBase
nuget/CoreWCF.NetFramingBase
NuGet
≥ 1.9.0
< 1.9.1
1.9.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-p86g-xrr2-pf7c
CoreWCF Source Repository REPOSITORY
https://github.com/CoreWCF/CoreWCF

Frequently Asked Questions

What is CVE-2026-54772?
CVE-2026-54772 is a security vulnerability in CoreWCF involving Pre-authentication infinite-loop CPU exhaustion in CoreWCF net.tcp / net.pipe / net.uds framing handshake under CWE-400: Uncontrolled Resource Consumption.
Which CoreWCF versions are affected?
Affected versions include releases prior to 1.8.1, 1.9.1 across affected packages: CoreWCF.NetFramingBase.
What version fixes CVE-2026-54772?
Upgrading to 1.8.1, 1.9.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is CoreWCF.NetFramingBase affected?
Yes, CoreWCF.NetFramingBase is affected in releases prior to 1.8.1, 1.9.1. Upgrade your dependency to 1.8.1, 1.9.1 or later.
What is the CVSS score of CVE-2026-54772?
CVE-2026-54772 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-54772?
CVE-2026-54772 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check NuGet dependencies for CVE-2026-54772?
Run the dependency tree command: 'inspect dependencies for CoreWCF.NetFramingBase'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-p86g-xrr2-pf7c",
  "modified" : "2026-06-19T20:46:40Z",
  "published" : "2026-06-19T20:46:40Z",
  "aliases" : [ "CVE-2026-54772" ],
  "summary" : "CoreWCF: Pre-authentication infinite-loop CPU exhaustion in CoreWCF net.tcp / net.pipe / net.uds framing handshake",
  "details" : "### Impact\nAn unauthenticated remote attacker can pin one server thread‑pool worker at 100 % CPU per connection. With a few connections, the CPU usage can be exhausted.\n\n#### Preconditions\nAn attacker being able to reach a service which is exposing an endpoint using one of NetTcpBinding, NetNamedPipeBinding, or UnixDomainSocketBinding.\n\n### Patches\nFixed in CoreWCF v1.8.1 and v1.9.1\n\n### Workarounds\nNone",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "CoreWCF.NetFramingBase"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.8.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "CoreWCF.NetFramingBase"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.9.0"
      }, {
        "fixed" : "1.9.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-p86g-xrr2-pf7c"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/CoreWCF/CoreWCF"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-835" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-19T20:46:40Z",
    "nvd_published_at" : null
  }
}