CVE-2024-26190 Microsoft QUIC Denial of Service Vulnerability

High 7.5 Published 12 Mar 2024 Updated 3 May 2025

Attackers can cause a denial of service in Microsoft QUIC implementations affecting Windows, .NET, and Visual Studio.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2024-26190?

CVE-2024-26190 is a high-severity denial of service vulnerability in Microsoft .Net, published on 12 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Microsoft QUIC Denial of Service Vulnerability

Weakness: CWE-400

Which versions are affected by CVE-2024-26190?

3 open source packages ship an affected version, including dotnet, dotnet-sdk and powershell. It affects 8 products.

Package	Affected	Fixed in
`dotnet` Bitnami	From `7.0.0`	`7.0.17, 8.0.3`
`dotnet-sdk` Bitnami	From `7.0.0`	`7.0.17, 8.0.3`
`powershell` Bitnami	From `7.3.0`	`7.3.12, 7.4.2`

Products include Microsoft .Net, Microsoft Powershell, Microsoft Visual Studio 2022, Microsoft Windows 11 21h2, Microsoft Windows 11 22h2, Microsoft Windows 11 23h2 and 2 more.

How do I fix CVE-2024-26190?

Upgrade dotnet to a fixed version for your release line: 7.0.17 or 8.0.3.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2024-26190 being exploited?

There is no known exploitation of CVE-2024-26190 in the wild and no public exploit code.

All Microsoft .Net vulnerabilities

Sources

Also known as BIT-dotnet-2024-26190, BIT-dotnet-sdk-2024-26190, BIT-powershell-2024-26190, CLEANSTART-2025-HX30489.