--- id: CVE-2026-96230 title: >- 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. summary: >- 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. severity: high cvss: 8.8 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H' cwe: - CWE-79 vendor: Microsoft product: Microsoft.AspNetCore.Components.WebAssembly.Server affected: - 'Microsoft.AspNetCore.Components.WebAssembly.Server >= 10.0.0, <= 10.0.12' - >- Microsoft.AspNetCore.Components.WebAssembly.Server >= 11.0.0-preview.1, <= 11.0.0-rc.1 - 'Microsoft.AspNetCore.Components.WebAssembly.Server >= 8.0.0, <= 8.0.31' - 'Microsoft.AspNetCore.Components.WebAssembly.Server >= 9.0.0, <= 9.0.20' patched: - Microsoft.AspNetCore.Components.WebAssembly.Server 10.0.13 - Microsoft.AspNetCore.Components.WebAssembly.Server 11.0.0-rc.2 - Microsoft.AspNetCore.Components.WebAssembly.Server 8.0.32 - Microsoft.AspNetCore.Components.WebAssembly.Server 9.0.21 published: '2026-10-13' updated: '2026-10-13' sourceUpdated: '2026-10-13T20:19:14.367' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-96230' references: - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96230' label: secure@microsoft.com - url: >- https://github.com/dotnet/aspnetcore/security/advisories/GHSA-qjpx-jqm5-h2c4 - url: 'https://github.com/dotnet/announcements/issues/478' - url: 'https://github.com/dotnet/aspnetcore/discussions/69802' - url: 'https://github.com/advisories/GHSA-qjpx-jqm5-h2c4' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-96230' - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-96230.json - url: 'https://access.redhat.com/security/cve/CVE-2026-96230' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2548804' - url: 'https://www.cve.org/CVERecord?id=CVE-2026-96230' - url: 'https://access.redhat.com/errata/RHSA-2026:86195' - url: 'https://access.redhat.com/errata/RHSA-2026:86168' - url: 'https://access.redhat.com/errata/RHSA-2026:86172' - url: 'https://access.redhat.com/errata/RHSA-2026:86192' - url: 'https://access.redhat.com/errata/RHSA-2026:86594' - url: 'https://access.redhat.com/errata/RHSA-2026:86170' - url: 'https://access.redhat.com/errata/RHSA-2026:86193' - url: 'https://access.redhat.com/errata/RHSA-2026:86169' - url: 'https://access.redhat.com/errata/RHSA-2026:86171' - url: 'https://access.redhat.com/errata/RHSA-2026:88474' - url: 'https://access.redhat.com/errata/RHSA-2026:88424' - url: 'https://access.redhat.com/errata/RHSA-2026:88425' - url: 'https://access.redhat.com/errata/RHSA-2026:88422' tags: - nvd - ghsa - nuget - cve.org - exploit-available - csaf - vex - red-hat aliases: - GHSA-qjpx-jqm5-h2c4 ecosystem: nuget ingestedAt: '2026-10-13T19:43:29.253Z' ssvc: exploitation: none automatable: 'no' technicalImpact: total timestamp: '2026-10-13T19:46:52.350163Z' epss: 0.00946 epssPercentile: 0.60923 exploits: github: 1 githubRepos: - 'https://github.com/codevalai/microsoft-security-advisory-cv' checkedAt: '2026-10-27T19:24:18.532Z' exploitAvailable: true --- ## Overview 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. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Package advisory (CVE-2026-96230) Affected packages: - `Microsoft.AspNetCore.Components.WebAssembly.Server >= 10.0.0, <= 10.0.12` - `Microsoft.AspNetCore.Components.WebAssembly.Server >= 11.0.0-preview.1, <= 11.0.0-rc.1` - `Microsoft.AspNetCore.Components.WebAssembly.Server >= 8.0.0, <= 8.0.31` - `Microsoft.AspNetCore.Components.WebAssembly.Server >= 9.0.0, <= 9.0.20` Patched in: - `Microsoft.AspNetCore.Components.WebAssembly.Server 10.0.13` - `Microsoft.AspNetCore.Components.WebAssembly.Server 11.0.0-rc.2` - `Microsoft.AspNetCore.Components.WebAssembly.Server 8.0.32` - `Microsoft.AspNetCore.Components.WebAssembly.Server 9.0.21` Source: https://github.com/advisories/GHSA-qjpx-jqm5-h2c4 ## Vendor advisories - **RHSA-2026:86195** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86195) - **RHSA-2026:86168** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86168) - **RHSA-2026:86172** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86172) - **RHSA-2026:86192** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86192) - **RHSA-2026:86594** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:86594) - **RHSA-2026:86170** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86170) - **RHSA-2026:86193** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86193) - **RHSA-2026:86169** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86169) - **RHSA-2026:86171** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86171) - **RHSA-2026:88474** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-10-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:88474) - **RHSA-2026:88424** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-10-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:88424) - **RHSA-2026:88425** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-10-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:88425) - **RHSA-2026:88422** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6) · released 2026-10-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:88422)