Description
Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | System.Formats.Cbor | 10.0.0 – < 9.0.24 | 9.0.24 |
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | dotnet7 | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | dotnet10-runtime | 10.0.15-r0 | — |
| Alpine v3.24 | dotnet8-runtime | 8.0.34-r0 | — |
| Alpine v3.23 | dotnet8-runtime | 8.0.34-r0 | — |
| Alpine v3.22 | dotnet8-runtime | 8.0.34-r0 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | aspnet-10-targeting-pack | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| NuGet | System.Formats.Cbor | >= 8.0.0-0, < 8.0.2 | 8.0.2 | GHSA-vmv3-wvjp-wqpj |
| NuGet | System.Formats.Cbor | >= 9.0.0-0, < 9.0.24 | 9.0.24 | GHSA-vmv3-wvjp-wqpj |
| NuGet | System.Formats.Cbor | >= 10.0.0-0, < 10.0.15 | 10.0.15 | GHSA-vmv3-wvjp-wqpj |
| NuGet | System.Formats.Cbor | >= 11.0.0-0, < 11.0.0 | 11.0.0 | GHSA-vmv3-wvjp-wqpj |
Advisories 2
- MSRC-CVE-2026-118747 .NET Denial of Service Vulnerability Microsoft Security Response Center · Nov 11, 2026
- NCSC-2026-0473 Kwetsbaarheden verholpen in Microsoft Developer Tools NCSC-NL (Netherlands) · Nov 10, 2026
References
- .NET Denial of Service Vulnerability vendor-advisory patch