High severity7.5NVD Advisory· Published May 12, 2026· Updated May 13, 2026
CVE-2026-42899
CVE-2026-42899
Description
Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
Microsoft.AspNetCore.App.Runtime.win-armNuGet | >= 8.0.0, < 8.0.27 | 8.0.27 |
Microsoft.AspNetCore.App.Runtime.win-arm64NuGet | >= 8.0.0, < 8.0.27 | 8.0.27 |
Microsoft.AspNetCore.App.Runtime.win-x64NuGet | >= 8.0.0, < 8.0.27 | 8.0.27 |
Microsoft.AspNetCore.App.Runtime.win-x86NuGet | >= 8.0.0, < 8.0.27 | 8.0.27 |
Microsoft.AspNetCore.App.Runtime.linux-armNuGet | >= 8.0.0, < 8.0.27 | 8.0.27 |
Microsoft.AspNetCore.App.Runtime.linux-arm64NuGet | >= 8.0.0, < 8.0.27 | 8.0.27 |
Microsoft.AspNetCore.App.Runtime.linux-musl-armNuGet | >= 8.0.0, < 8.0.27 | 8.0.27 |
Microsoft.AspNetCore.App.Runtime.linux-musl-arm64NuGet | >= 8.0.0, < 8.0.27 | 8.0.27 |
Microsoft.AspNetCore.App.Runtime.linux-musl-x64NuGet | >= 8.0.0, < 8.0.27 | 8.0.27 |
Microsoft.AspNetCore.App.Runtime.linux-x64NuGet | >= 8.0.0, < 8.0.27 | 8.0.27 |
Microsoft.AspNetCore.App.Runtime.osx-arm64NuGet | >= 8.0.0, < 8.0.27 | 8.0.27 |
Microsoft.AspNetCore.App.Runtime.osx-x64NuGet | >= 8.0.0, < 8.0.27 | 8.0.27 |
Microsoft.AspNetCore.App.Runtime.win-armNuGet | >= 9.0.0, < 9.0.16 | 9.0.16 |
Microsoft.AspNetCore.App.Runtime.win-armNuGet | >= 10.0.0, < 10.0.8 | 10.0.8 |
Microsoft.AspNetCore.App.Runtime.win-arm64NuGet | >= 9.0.0, < 9.0.16 | 9.0.16 |
Microsoft.AspNetCore.App.Runtime.win-arm64NuGet | >= 10.0.0, < 10.0.8 | 10.0.8 |
Microsoft.AspNetCore.App.Runtime.win-x64NuGet | >= 9.0.0, < 9.0.16 | 9.0.16 |
Microsoft.AspNetCore.App.Runtime.win-x64NuGet | >= 10.0.0, < 10.0.8 | 10.0.8 |
Microsoft.AspNetCore.App.Runtime.win-x86NuGet | >= 9.0.0, < 9.0.16 | 9.0.16 |
Microsoft.AspNetCore.App.Runtime.win-x86NuGet | >= 10.0.0, < 10.0.8 | 10.0.8 |
Microsoft.AspNetCore.App.Runtime.linux-armNuGet | >= 9.0.0, < 9.0.16 | 9.0.16 |
Microsoft.AspNetCore.App.Runtime.linux-armNuGet | >= 10.0.0, < 10.0.8 | 10.0.8 |
Microsoft.AspNetCore.App.Runtime.linux-arm64NuGet | >= 9.0.0, < 9.0.16 | 9.0.16 |
Microsoft.AspNetCore.App.Runtime.linux-arm64NuGet | >= 10.0.0, < 10.0.8 | 10.0.8 |
Microsoft.AspNetCore.App.Runtime.linux-musl-armNuGet | >= 9.0.0, < 9.0.16 | 9.0.16 |
Microsoft.AspNetCore.App.Runtime.linux-musl-armNuGet | >= 10.0.0, < 10.0.8 | 10.0.8 |
Microsoft.AspNetCore.App.Runtime.linux-musl-arm64NuGet | >= 9.0.0, < 9.0.16 | 9.0.16 |
Microsoft.AspNetCore.App.Runtime.linux-musl-arm64NuGet | >= 10.0.0, < 10.0.8 | 10.0.8 |
Microsoft.AspNetCore.App.Runtime.linux-musl-x64NuGet | >= 10.0.0, < 10.0.8 | 10.0.8 |
Microsoft.AspNetCore.App.Runtime.linux-musl-x64NuGet | >= 9.0.0, < 9.0.16 | 9.0.16 |
Microsoft.AspNetCore.App.Runtime.linux-x64NuGet | >= 9.0.0, < 9.0.16 | 9.0.16 |
Microsoft.AspNetCore.App.Runtime.linux-x64NuGet | >= 10.0.0, < 10.0.8 | 10.0.8 |
Microsoft.AspNetCore.App.Runtime.osx-arm64NuGet | >= 9.0.0, < 9.0.16 | 9.0.16 |
Microsoft.AspNetCore.App.Runtime.osx-arm64NuGet | >= 10.0.0, < 10.0.8 | 10.0.8 |
Microsoft.AspNetCore.App.Runtime.osx-x64NuGet | >= 9.0.0, < 9.0.16 | 9.0.16 |
Microsoft.AspNetCore.App.Runtime.osx-x64NuGet | >= 10.0.0, < 10.0.8 | 10.0.8 |
Affected products
48- osv-coords47 versionspkg:apk/chainguard/dotnet-bootstrap-8pkg:apk/chainguard/dotnet-bootstrap-9pkg:apk/wolfi/dotnet-bootstrap-8pkg:apk/wolfi/dotnet-bootstrap-9pkg:bitnami/dotnetpkg:bitnami/dotnet-sdkpkg:rpm/almalinux/aspnetcore-runtime-10.0pkg:rpm/almalinux/aspnetcore-runtime-8.0pkg:rpm/almalinux/aspnetcore-runtime-9.0pkg:rpm/almalinux/aspnetcore-runtime-dbg-10.0pkg:rpm/almalinux/aspnetcore-runtime-dbg-8.0pkg:rpm/almalinux/aspnetcore-runtime-dbg-9.0pkg:rpm/almalinux/aspnetcore-targeting-pack-10.0pkg:rpm/almalinux/aspnetcore-targeting-pack-8.0pkg:rpm/almalinux/aspnetcore-targeting-pack-9.0pkg:rpm/almalinux/dotnetpkg:rpm/almalinux/dotnet-apphost-pack-10.0pkg:rpm/almalinux/dotnet-apphost-pack-8.0pkg:rpm/almalinux/dotnet-apphost-pack-9.0pkg:rpm/almalinux/dotnet-hostpkg:rpm/almalinux/dotnet-hostfxr-10.0pkg:rpm/almalinux/dotnet-hostfxr-8.0pkg:rpm/almalinux/dotnet-hostfxr-9.0pkg:rpm/almalinux/dotnet-runtime-10.0pkg:rpm/almalinux/dotnet-runtime-8.0pkg:rpm/almalinux/dotnet-runtime-9.0pkg:rpm/almalinux/dotnet-runtime-dbg-10.0pkg:rpm/almalinux/dotnet-runtime-dbg-8.0pkg:rpm/almalinux/dotnet-runtime-dbg-9.0pkg:rpm/almalinux/dotnet-sdk-10.0pkg:rpm/almalinux/dotnet-sdk-10.0-source-built-artifactspkg:rpm/almalinux/dotnet-sdk-8.0pkg:rpm/almalinux/dotnet-sdk-8.0-source-built-artifactspkg:rpm/almalinux/dotnet-sdk-9.0pkg:rpm/almalinux/dotnet-sdk-9.0-source-built-artifactspkg:rpm/almalinux/dotnet-sdk-aot-10.0pkg:rpm/almalinux/dotnet-sdk-aot-9.0pkg:rpm/almalinux/dotnet-sdk-dbg-10.0pkg:rpm/almalinux/dotnet-sdk-dbg-8.0pkg:rpm/almalinux/dotnet-sdk-dbg-9.0pkg:rpm/almalinux/dotnet-targeting-pack-10.0pkg:rpm/almalinux/dotnet-targeting-pack-8.0pkg:rpm/almalinux/dotnet-targeting-pack-9.0pkg:rpm/almalinux/dotnet-templates-10.0pkg:rpm/almalinux/dotnet-templates-8.0pkg:rpm/almalinux/dotnet-templates-9.0pkg:rpm/almalinux/netstandard-targeting-pack-2.1
< 8.0.127-r0+ 46 more
- (no CPE)range: < 8.0.127-r0
- (no CPE)range: < 9.0.118-r0
- (no CPE)range: < 8.0.127-r0
- (no CPE)range: < 9.0.118-r0
- (no CPE)range: >= 8.0.0, < 8.0.27
- (no CPE)range: >= 8.0.0, < 8.0.27
- (no CPE)range: < 10.0.8-1.el8_10
- (no CPE)range: < 8.0.27-1.el10_2
- (no CPE)range: < 9.0.16-1.el8_10
- (no CPE)range: < 10.0.8-1.el8_10
- (no CPE)range: < 8.0.27-1.el10_2
- (no CPE)range: < 9.0.16-1.el8_10
- (no CPE)range: < 10.0.8-1.el8_10
- (no CPE)range: < 8.0.27-1.el10_2
- (no CPE)range: < 9.0.16-1.el8_10
- (no CPE)range: < 10.0.108-1.el8_10
- (no CPE)range: < 10.0.8-1.el8_10
- (no CPE)range: < 8.0.27-1.el10_2
- (no CPE)range: < 9.0.16-1.el8_10
- (no CPE)range: < 10.0.8-1.el8_10
- (no CPE)range: < 10.0.8-1.el8_10
- (no CPE)range: < 8.0.27-1.el10_2
- (no CPE)range: < 9.0.16-1.el8_10
- (no CPE)range: < 10.0.8-1.el8_10
- (no CPE)range: < 8.0.27-1.el10_2
- (no CPE)range: < 9.0.16-1.el8_10
- (no CPE)range: < 10.0.8-1.el8_10
- (no CPE)range: < 8.0.27-1.el10_2
- (no CPE)range: < 9.0.16-1.el8_10
- (no CPE)range: < 10.0.108-1.el8_10
- (no CPE)range: < 10.0.108-1.el8_10
- (no CPE)range: < 8.0.127-1.el10_2
- (no CPE)range: < 8.0.127-1.el10_2
- (no CPE)range: < 9.0.117-1.el8_10
- (no CPE)range: < 9.0.117-1.el8_10
- (no CPE)range: < 10.0.108-1.el8_10
- (no CPE)range: < 9.0.117-1.el8_10
- (no CPE)range: < 10.0.108-1.el8_10
- (no CPE)range: < 8.0.127-1.el10_2
- (no CPE)range: < 9.0.117-1.el8_10
- (no CPE)range: < 10.0.8-1.el8_10
- (no CPE)range: < 8.0.27-1.el10_2
- (no CPE)range: < 9.0.16-1.el8_10
- (no CPE)range: < 10.0.108-1.el8_10
- (no CPE)range: < 8.0.127-1.el10_2
- (no CPE)range: < 9.0.117-1.el8_10
- (no CPE)range: < 9.0.117-1.el8_10
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-9v76-4qcc-frghghsaADVISORY
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899nvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-42899ghsaADVISORY
- github.com/dotnet/announcements/issues/397ghsaWEB
- github.com/dotnet/aspnetcore/security/advisories/GHSA-9v76-4qcc-frghghsaWEB
News mentions
2- Patch Tuesday - May 2026Rapid7 Blog · May 13, 2026
- Microsoft May 2026 Patch Tuesday fixes 120 flaws, no zero-daysBleepingComputer · May 12, 2026