Description
Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 – < 17.14.42 | 17.14.42 |
| Microsoft | Microsoft Visual Studio 2026 version 18.10 | 18.10.0 – < 18.10.4 | 18.10.4 |
| Microsoft | System.Formats.Cbor | 10.0.0 – < 10.0.13 | 10.0.13 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | dotnet +5 | 8.0.133-1.amzn2023.0.1 | ALAS2023-2026-3367, ALAS2023-2026-3366, ALAS2023-2026-3248 |
| Amazon Linux 2023 | dotnet-host +8 | 8.0.33-1.amzn2023.0.1 | ALAS2023-2026-3367, ALAS2023-2026-3366, ALAS2023-2026-3248 |
| Amazon Linux 2023 | dotnet-hostfxr-10.0 +7 | 10.0.14-1.amzn2023.0.1 | ALAS2023-2026-3366 |
| Amazon Linux 2023 | dotnet-hostfxr-9.0 +7 | 9.0.21-1.amzn2023.0.1 | ALAS2023-2026-3248 |
| Amazon Linux 2023 | dotnet-sdk-10.0 +4 | 10.0.114-1.amzn2023.0.1 | ALAS2023-2026-3366 |
| Amazon Linux 2023 | dotnet-sdk-9.0 +4 | 9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3248 |
Advisories 5
- WID-SEC-2026-3893 Microsoft Entwicklerwerkzeuge: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 4, 2026
- ALAS2023-2026-3366 Important: dotnet10.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Nov 2, 2026
- ALAS2023-2026-3367 Important: dotnet8.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Nov 2, 2026
- ALAS2023-2026-3248 Critical: dotnet9.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 30, 2026
- MSRC-CVE-2026-109468 ASP.NET Core Denial of Service Vulnerability Microsoft Security Response Center · Oct 16, 2026
References
- ASP.NET Core Denial of Service Vulnerability vendor-advisory patch