---
id: CVE-2026-54772
title: >-
  CoreWCF: Pre-authentication infinite-loop CPU exhaustion in CoreWCF net.tcp /
  net.pipe / net.uds framing handshake
summary: >-
  CoreWCF: Pre-authentication infinite-loop CPU exhaustion in CoreWCF net.tcp /
  net.pipe / net.uds framing handshake
severity: high
cvss: 7.5
cwe:
  - CWE-400
  - CWE-835
vendor: CoreWCF
product: CoreWCF.NetFramingBase
ecosystem: nuget
affected:
  - CoreWCF.NetFramingBase < 1.8.1
  - 'CoreWCF.NetFramingBase >= 1.9.0, < 1.9.1'
patched:
  - CoreWCF.NetFramingBase 1.8.1
  - CoreWCF.NetFramingBase 1.9.1
published: '2026-06-19'
updated: '2026-06-19'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-p86g-xrr2-pf7c'
references:
  - url: 'https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-p86g-xrr2-pf7c'
  - url: 'https://github.com/advisories/GHSA-p86g-xrr2-pf7c'
tags:
  - ghsa
  - nuget
ingestedAt: '2026-06-22T13:35:24.444Z'
epss: 0.00848
epssPercentile: 0.56264
---

## Overview

### 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

## Affected packages

- `CoreWCF.NetFramingBase < 1.8.1`
- `CoreWCF.NetFramingBase >= 1.9.0, < 1.9.1`

## Remediation

Upgrade to a patched release:

- `CoreWCF.NetFramingBase 1.8.1`
- `CoreWCF.NetFramingBase 1.9.1`