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NuGet package

microsoft.aspnetcore.webutilities

Open actionable advisories and recorded vendor fixes. This public package view has no inventory attached and cannot establish whether your deployment is affected. A vendor fix never resolves your finding; verify your installed version and the source guidance.

Open advisories

2 actionable advisories, newest first. Withdrawn advisories and news are excluded. Coverage is partial.

  1. High, CVSS 7.5NuGetAmendedPublished

    Microsoft Security Advisory CVE-2026-118750 - ASP.NET Core Denial of Service Vulnerability

    CVE-2026-118750 · GHSA-6527-9fp8-r4x6

    Affected
    • NuGet microsoft.aspnetcore.webutilities >= 2.3.0, < 2.3.14
    Fixed in
    2.3.14· Vendor fix available
    Issue
    Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core. This advisory provides guidance on updating affected applications and components. FileBufferingReadStream buffer allocation can allow unauthenticated multipart-form requests to exhaust memory. Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/512 CVSS Details - Version: 3.1 - Severity: High - Score: 7.5 (base score) - Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C` - Weakness: CWE-770 Affected Platforms - Platforms: Any supported OS - Architectures: All Affected Packages The table lists the affected package range and the fixed NuGet version. ASP.NET Core 2.3 - standalone packages Package | Affected version | Patched version --- | --- | --- Microsoft.AspNetCore.WebUtilities…

    Recommended action: Upgrade to 2.3.14 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:github.com (1)osv.dev (2)Source checked Evidence →
  2. High, CVSS 7.5NuGetAmendedPublished

    Microsoft Security Advisory CVE-2026-114149 - ASP.NET Core Denial of Service Vulnerability

    CVE-2026-114149 · GHSA-x33c-w48q-qrgc

    Affected
    • NuGet microsoft.aspnetcore.webutilities >= 8.0.0-preview.5.23302.2, < 8.0.34; >= 9.0.0-preview.1.24081.5, < 9.0.23; >= 10.0.0-preview.1.25120.3, < 10.0.15; >= 11.0.0-preview.1.26104.118, < 11.0.0
    Fixed in
    9.0.238.0.3410.0.1511.0.0· Vendor fix available
    Issue
    Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core. This advisory provides guidance on updating affected applications and components. Multipart form processing can bypass the configured header-count limit and consume excessive resources. Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/511 CVSS Details - Version: 3.1 - Severity: High - Score: 7.5 (base score) - Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C` - Weakness: CWE-770 Affected Platforms - Platforms: Windows, Linux, macOS - Architectures: All Affected Packages The tables list affected version ranges and fixed package versions. Runtime and standalone deliveries are listed separately. .NET 8.0 - affected runtime packages Package | Affected version | Patched version --- | --- | ---…

    Recommended action: Upgrade to 11.0.0, 10.0.15, 9.0.23 or 8.0.34 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:github.com (1)osv.dev (2)Source checked Evidence →