Description
Improper neutralization of input during web page generation ('cross-site scripting') in ASP.NET Core allows an unauthorized attacker to execute code 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 | Microsoft.AspNetCore.Components.WebAssembly.Server | 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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | dotnet10 | 10.0.113-10.0.13-0ubuntu1~26.10.1 | USN-8942-1 |
| Ubuntu 26.10 | dotnet11 | 11.0.100-11.0.0~rc2-0ubuntu1~26.10.1 | USN-8942-1 |
| Ubuntu 26.04 LTS | dotnet10 | 10.0.113-10.0.13-0ubuntu1~26.04.1 | USN-8942-1 |
| Ubuntu 24.04 LTS | dotnet10 | 10.0.113-10.0.13-0ubuntu1~24.04.1 | USN-8942-1 |
| Ubuntu 24.04 LTS | dotnet8 | 8.0.132-8.0.32-0ubuntu1~24.04.1 | USN-8942-1 |
| Ubuntu 22.04 LTS | dotnet6 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | dotnet8 | 8.0.132-8.0.32-0ubuntu1~22.04.1 | USN-8942-1 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | dotnet-host +8 | 10.0.13-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux 10 | dotnet-hostfxr-8.0 +7 | 8.0.32-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux 10 | dotnet-hostfxr-9.0 +7 | 9.0.21-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux 10 | dotnet-sdk-10.0 +4 | 10.0.113-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux 10 | dotnet-sdk-8.0 +3 | 8.0.132-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux 10 | dotnet-sdk-9.0 +5 | 9.0.122-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux 9 | dotnet-host +8 | 10.0.13-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux 9 | dotnet-hostfxr-8.0 +7 | 8.0.32-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux 9 | dotnet-hostfxr-9.0 +7 | 9.0.21-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux 9 | dotnet-sdk-10.0 +4 | 10.0.113-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux 9 | dotnet-sdk-8.0 +3 | 8.0.132-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux 9 | dotnet-sdk-9.0 +5 | 9.0.122-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux 8 | dotnet +5 | 10.0.113-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux 8 | dotnet-hostfxr-10.0 +7 | 10.0.13-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux 8 | dotnet-hostfxr-8.0 +7 | 8.0.32-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux 8 | dotnet-hostfxr-9.0 +7 | 9.0.21-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux 8 | dotnet-sdk-8.0 +3 | 8.0.132-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux 8 | dotnet-sdk-9.0 +5 | 9.0.122-1.el8_10 | ALSA-2026:86170 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | dotnet10.0 | 10.0.113-1.el10_2 | RLSA-2026:86195 |
| Rocky Linux 10 | dotnet8.0 | 8.0.132-1.el10_2 | RLSA-2026:86168 |
| Rocky Linux 10 | dotnet9.0 | 9.0.122-1.el10_2 | RLSA-2026:86172 |
| Rocky Linux 9 | dotnet10.0 | 10.0.113-1.el9_8 | RLSA-2026:86193 |
| Rocky Linux 9 | dotnet8.0 | 8.0.132-1.el9_8 | RLSA-2026:86169 |
| Rocky Linux 9 | dotnet9.0 | 9.0.122-1.el9_8 | RLSA-2026:86171 |
| Rocky Linux 8 | dotnet10.0 | 10.0.113-1.el8_10 | RLSA-2026:86192 |
| Rocky Linux 8 | dotnet8.0 | 8.0.132-2.el8_10 | RLSA-2026:86594 |
| Rocky Linux 8 | dotnet9.0 | 9.0.122-1.el8_10 | RLSA-2026:86170 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | dotnet10-runtime | 10.0.13-r0 | — |
| Alpine v3.24 | dotnet8-runtime | 8.0.32-r0 | — |
| Alpine v3.24 | dotnet9-runtime | 9.0.21-r0 | — |
| Alpine v3.23 | dotnet10-runtime | 10.0.13-r0 | — |
| Alpine v3.23 | dotnet8-runtime | 8.0.32-r0 | — |
| Alpine v3.23 | dotnet9-runtime | 9.0.21-r0 | — |
| Alpine v3.22 | dotnet8-runtime | 8.0.32-r0 | — |
| Alpine v3.22 | dotnet9-runtime | 9.0.21-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | dotnet +6 | 9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3248 |
| Amazon Linux 2023 | dotnet-host +8 | 9.0.21-1.amzn2023.0.1 | ALAS2023-2026-3248 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | dotnet-host +8 | 10.0.13-1.0.1.el10_2 | ELSA-2026-86195 |
| Oracle Linux 10 | dotnet-hostfxr-8.0 +7 | 8.0.32-1.0.1.el10_2 | ELSA-2026-86168 |
| Oracle Linux 10 | dotnet-hostfxr-9.0 +7 | 9.0.21-1.0.1.el10_2 | ELSA-2026-86172 |
| Oracle Linux 10 | dotnet-sdk-10.0 +4 | 10.0.113-1.0.1.el10_2 | ELSA-2026-86195 |
| Oracle Linux 10 | dotnet-sdk-8.0 +3 | 8.0.132-1.0.1.el10_2 | ELSA-2026-86168 |
| Oracle Linux 10 | dotnet-sdk-9.0 +5 | 9.0.122-1.0.1.el10_2 | ELSA-2026-86172 |
| Oracle Linux 9 | dotnet-host +8 | 10.0.13-1.0.1.el9_8 | ELSA-2026-86193 |
| Oracle Linux 9 | dotnet-hostfxr-8.0 +7 | 8.0.32-1.0.1.el9_8 | ELSA-2026-86169 |
| Oracle Linux 9 | dotnet-hostfxr-9.0 +7 | 9.0.21-1.0.1.el9_8 | ELSA-2026-86171 |
| Oracle Linux 9 | dotnet-sdk-10.0 +4 | 10.0.113-1.0.1.el9_8 | ELSA-2026-86193 |
| Oracle Linux 9 | dotnet-sdk-8.0 +3 | 8.0.132-1.0.1.el9_8 | ELSA-2026-86169 |
| Oracle Linux 9 | dotnet-sdk-9.0 +5 | 9.0.122-1.0.1.el9_8 | ELSA-2026-86171 |
| Oracle Linux 8 | dotnet +5 | 10.0.114-1.0.2.el8_10 | ELSA-2026-86192 |
| Oracle Linux 8 | dotnet-host +8 | 10.0.14-1.0.2.el8_10 | ELSA-2026-86192 |
| Oracle Linux 8 | dotnet-hostfxr-8.0 +7 | 8.0.32-2.0.1.el8_10 | ELSA-2026-86594 |
| Oracle Linux 8 | dotnet-hostfxr-9.0 +7 | 9.0.21-1.0.1.el8_10 | ELSA-2026-86170 |
| Oracle Linux 8 | dotnet-sdk-8.0 +3 | 8.0.132-2.0.1.el8_10 | ELSA-2026-86594 |
| Oracle Linux 8 | dotnet-sdk-9.0 +5 | 9.0.122-1.0.1.el8_10 | ELSA-2026-86170 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
codevalai/microsoft-security-advisory-cv ★ 0 · Oct 14, 2026
Autonomous submission for "Microsoft Security Advisory CVE-2026-96230 - ASP.NET Core Remote Code Execution Vulnerability" (MSRC / GitHub Security Advisory)
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| NuGet | Microsoft.AspNetCore.Components.WebAssembly.Server | >= 10.0.0, < 10.0.13 | 10.0.13 | GHSA-qjpx-jqm5-h2c4 |
| NuGet | Microsoft.AspNetCore.Components.WebAssembly.Server | >= 11.0.0-preview.1, < 11.0.0-rc.2 | 11.0.0-rc.2 | GHSA-qjpx-jqm5-h2c4 |
| NuGet | Microsoft.AspNetCore.Components.WebAssembly.Server | >= 8.0.0, < 8.0.32 | 8.0.32 | GHSA-qjpx-jqm5-h2c4 |
| NuGet | Microsoft.AspNetCore.Components.WebAssembly.Server | >= 9.0.0, < 9.0.21 | 9.0.21 | GHSA-qjpx-jqm5-h2c4 |
Advisories 32
- ALSA-2026:86192 Critical: .NET 10.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2026:86195 Critical: .NET 10.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 5, 2026
- ALSA-2026:86193 Critical: .NET 10.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 5, 2026
- WID-SEC-2026-3893 Microsoft Entwicklerwerkzeuge: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 4, 2026
- ELSA-2026-86192 Critical: .NET 10.0 security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 3, 2026
- ALSA-2026:86594 Critical: .NET 8.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 2, 2026
- ALSA-2026:86172 Critical: .NET 9.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 31, 2026
- ALSA-2026:86168 Critical: .NET 8.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 31, 2026
- ALSA-2026:86171 Critical: .NET 9.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 31, 2026
- ALSA-2026:86169 Critical: .NET 8.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 31, 2026
- ALSA-2026:86170 Critical: .NET 9.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 31, 2026
- ALAS2023-2026-3248 Critical: dotnet9.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 30, 2026
- USN-8942-1 dotnet8, dotnet10, dotnet11 vulnerabilities Ubuntu Security Notices (USN) · Oct 30, 2026
- RLSA-2026:86193 Critical: .NET 10.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 22, 2026
- RLSA-2026:86171 Critical: .NET 9.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 22, 2026
- RLSA-2026:86195 Critical: .NET 10.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 22, 2026
- RLSA-2026:86170 Critical: .NET 9.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 22, 2026
- RLSA-2026:86172 Critical: .NET 9.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 22, 2026
- RLSA-2026:86192 Critical: .NET 10.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 22, 2026
- RLSA-2026:86594 Critical: .NET 8.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 22, 2026
- RLSA-2026:86168 Critical: .NET 8.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 22, 2026
- RLSA-2026:86169 Critical: .NET 8.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 22, 2026
- ELSA-2026-86170 Critical: .NET 9.0 security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 21, 2026
- ELSA-2026-86168 Critical: .NET 8.0 security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Oct 21, 2026
- ELSA-2026-86195 Critical: .NET 10.0 security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Oct 21, 2026
- ELSA-2026-86172 Critical: .NET 9.0 security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Oct 21, 2026
- ELSA-2026-86193 Critical: .NET 10.0 security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 21, 2026
- ELSA-2026-86169 Critical: .NET 8.0 security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 21, 2026
- ELSA-2026-86171 Critical: .NET 9.0 security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 21, 2026
- ELSA-2026-86594 Critical: .NET 8.0 security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 21, 2026
- NCSC-2026-0426 Kwetsbaarheden verholpen in Microsoft Developer Tools NCSC-NL (Netherlands) · Oct 13, 2026
- MSRC-CVE-2026-96230 ASP.NET Core Remote Code Execution Vulnerability Microsoft Security Response Center · Oct 13, 2026
References
- ASP.NET Core Remote Code Execution Vulnerability vendor-advisory patch