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CVE-2026-114157 ASP.NET Core Security Feature Bypass Vulnerability

7.5 highEPSS 0.2%Fix available

High (7.5) in microsoft. EPSS 0.2% estimated probability of exploitation activity in the next 30 days. Fixed in Microsoft.AspNetCore.App.Runtime.win-arm64 10.0.15, 11.0.0, 8.0.34.

On this page
Concurrent execution using shared resource with improper synchronization ('race condition') in ASP.NET Core allows an authorized attacker to elevate privileges locally.

Severity

CVSS 3.1

7.5 high
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
EPSS
0.2% estimated probability of exploitation activity in the next 30 days; 16th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CISA's assessment (SSVC)
Exploitation: none · Automatable: no · Technical impact: total, assessed 2026-11-10. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
CWE
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)
OWASP Top 10
A06:2025 Insecure Design
Published
Modified
Assigned by
microsoft (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

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Affected

  • microsoft:.net 10.0 installed on windows
  • microsoft:.net 11.0 installed on windows
  • microsoft:.net 8.0 installed on windows
  • microsoft:.net 9.0 installed on windows
  • microsoft:microsoft visual studio 2022 version 17.14
  • microsoft:microsoft visual studio 2026 version 18.11
  • microsoft:microsoft visual studio 2026 version 18.12

Versions

From the CNA's record in the CVE List.

ProductAffected
Microsoft .NET 10.0 installed on Windowsfrom 10.0.0 before 10.0.15
Microsoft .NET 11.0 installed on Windowsfrom 11.0.0-preview.1 before 11.0.0
Microsoft .NET 8.0 installed on Windowsfrom 8.0.0 before 8.0.34
Microsoft .NET 9.0 installed on Windowsfrom 9.0.0 before 9.0.23
Microsoft Visual Studio 2022 version 17.14from 17.14.0 before 17.14.45
Microsoft Visual Studio 2026 version 18.11from 18.11.0 before 18.11.4
Microsoft Visual Studio 2026 version 18.12from 18.12.0 before 18.12.0

Fix and patched versions

  • Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet): fixed in 8.0.34, 9.0.23, 10.0.15, 11.0.0
  • Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet): fixed in 8.0.34, 9.0.23, 10.0.15, 11.0.0
  • Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet): fixed in 8.0.34, 9.0.23, 10.0.15, 11.0.0
  • Alpine: fixed package versions per release

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-7phj-vgxq-r67hNuGetMicrosoft.AspNetCore.App.Runtime.win-arm64>=8.0.0-preview.1.23112.2 <8.0.348.0.34
GHSA-7phj-vgxq-r67hNuGetMicrosoft.AspNetCore.App.Runtime.win-x64>=8.0.0-preview.1.23112.2 <8.0.348.0.34
GHSA-7phj-vgxq-r67hNuGetMicrosoft.AspNetCore.App.Runtime.win-x86>=8.0.0-preview.1.23112.2 <8.0.348.0.34
GHSA-7phj-vgxq-r67hNuGetMicrosoft.AspNetCore.App.Runtime.win-arm64>=9.0.0-preview.1.24081.5 <9.0.239.0.23
GHSA-7phj-vgxq-r67hNuGetMicrosoft.AspNetCore.App.Runtime.win-x64>=9.0.0-preview.1.24081.5 <9.0.239.0.23
GHSA-7phj-vgxq-r67hNuGetMicrosoft.AspNetCore.App.Runtime.win-x86>=9.0.0-preview.1.24081.5 <9.0.239.0.23
GHSA-7phj-vgxq-r67hNuGetMicrosoft.AspNetCore.App.Runtime.win-arm64>=10.0.0-preview.1.25120.3 <10.0.1510.0.15
GHSA-7phj-vgxq-r67hNuGetMicrosoft.AspNetCore.App.Runtime.win-x64>=10.0.0-preview.1.25120.3 <10.0.1510.0.15
GHSA-7phj-vgxq-r67hNuGetMicrosoft.AspNetCore.App.Runtime.win-x86>=10.0.0-preview.1.25120.3 <10.0.1510.0.15
GHSA-7phj-vgxq-r67hNuGetMicrosoft.AspNetCore.App.Runtime.win-arm64>=11.0.0-preview.1.26104.118 <11.0.011.0.0
GHSA-7phj-vgxq-r67hNuGetMicrosoft.AspNetCore.App.Runtime.win-x64>=11.0.0-preview.1.26104.118 <11.0.011.0.0
GHSA-7phj-vgxq-r67hNuGetMicrosoft.AspNetCore.App.Runtime.win-x86>=11.0.0-preview.1.26104.118 <11.0.011.0.0

Linux distributions

DistributionReleasePackageFixed inAdvisory
Ubuntu22.04:LTSdotnet7no fix listedUBUNTU-CVE-2026-114157
Alpinev3.22, v3.23, v3.24dotnet8-runtime8.0.34-r0ALPINE-CVE-2026-114157
Alpinev3.22, v3.23, v3.24dotnet9-runtime9.0.23-r0ALPINE-CVE-2026-114157
Alpinev3.24dotnet10-runtime10.0.15-r0ALPINE-CVE-2026-114157

From the distributions' data via OSV.dev: Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0; the Alpine secdb, CC BY-SA 4.0. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Ubuntu · Alpine.

Attack patterns (CAPEC)

  • CAPEC-26 Leveraging Race Conditions Likelihood: High · Severity: High
  • CAPEC-29 Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions Likelihood: High · Severity: High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

Check your stackJSON