cve.bz

CVE-2026-118748 ASP.NET Core Denial of Service Vulnerability

7.5 highEPSS 1.1%Fix available

High (7.5) in microsoft. EPSS 1.1% estimated probability of exploitation activity in the next 30 days. Fixed in Microsoft.AspNetCore.App.Runtime.linux-arm 11.0.0.

On this page
Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Severity

CVSS 3.1

7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
1.1% estimated probability of exploitation activity in the next 30 days; 65th 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: yes · Technical impact: partial, 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-770 Allocation of Resources Without Limits or Throttling
Published
Modified
Assigned by
microsoft (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

Ask an AI about this CVE

ChatGPTClaudeGoogle AI Mode

Show the promptExplain CVE-2026-118748 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-118748?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-118748?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-118748 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.

Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.

Badge for a README or a site

CVE-2026-118748

An image that stays current: it is drawn from the data each time it is fetched (a host that proxies images, as GitHub does, may show its copy for a while). Markdown:

[![CVE-2026-118748](https://cve.bz/cve/badge/CVE-2026-118748.svg)](https://cve.bz/cve/CVE-2026-118748)

HTML:

<a href="https://cve.bz/cve/CVE-2026-118748"><img src="https://cve.bz/cve/badge/CVE-2026-118748.svg" alt="CVE-2026-118748"></a>

Affected

  • microsoft:.net 11.0 installed on linux
  • microsoft:.net 11.0 installed on mac os
  • microsoft:.net 11.0 installed on windows
  • microsoft:microsoft visual studio 2026 version 18.12

Versions

From the CNA's record in the CVE List.

ProductAffected
Microsoft .NET 11.0 installed on Linuxfrom 11.0.0-preview.1 before 11.0.0
Microsoft .NET 11.0 installed on Mac OSfrom 11.0.0-preview.1 before 11.0.0
Microsoft .NET 11.0 installed on Windowsfrom 11.0.0-preview.1 before 11.0.0
Microsoft Visual Studio 2026 version 18.12from 18.12.0 before 18.12.0

Fix and patched versions

  • Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): fixed in 11.0.0
  • Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): fixed in 11.0.0
  • Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet): fixed in 11.0.0
  • Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): fixed in 11.0.0
  • Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): fixed in 11.0.0
  • Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): fixed in 11.0.0
  • Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet): fixed in 11.0.0
  • Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet): fixed in 11.0.0
  • Ubuntu: fixed package versions per release

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-5h82-77p6-2wp3NuGetMicrosoft.AspNetCore.App.Runtime.linux-arm>=11.0.0-preview.7.26381.103 <11.0.011.0.0
GHSA-5h82-77p6-2wp3NuGetMicrosoft.AspNetCore.App.Runtime.linux-arm64>=11.0.0-preview.7.26381.103 <11.0.011.0.0
GHSA-5h82-77p6-2wp3NuGetMicrosoft.AspNetCore.App.Runtime.linux-musl-arm>=11.0.0-preview.7.26381.103 <11.0.011.0.0
GHSA-5h82-77p6-2wp3NuGetMicrosoft.AspNetCore.App.Runtime.linux-musl-arm64>=11.0.0-preview.7.26381.103 <11.0.011.0.0
GHSA-5h82-77p6-2wp3NuGetMicrosoft.AspNetCore.App.Runtime.linux-musl-x64>=11.0.0-preview.7.26381.103 <11.0.011.0.0
GHSA-5h82-77p6-2wp3NuGetMicrosoft.AspNetCore.App.Runtime.linux-x64>=11.0.0-preview.7.26381.103 <11.0.011.0.0
GHSA-5h82-77p6-2wp3NuGetMicrosoft.AspNetCore.App.Runtime.osx-arm64>=11.0.0-preview.7.26381.103 <11.0.011.0.0
GHSA-5h82-77p6-2wp3NuGetMicrosoft.AspNetCore.App.Runtime.osx-x64>=11.0.0-preview.7.26381.103 <11.0.011.0.0
GHSA-5h82-77p6-2wp3NuGetMicrosoft.AspNetCore.App.Runtime.win-arm64>=11.0.0-preview.7.26381.103 <11.0.011.0.0
GHSA-5h82-77p6-2wp3NuGetMicrosoft.AspNetCore.App.Runtime.win-x64>=11.0.0-preview.7.26381.103 <11.0.011.0.0
GHSA-5h82-77p6-2wp3NuGetMicrosoft.AspNetCore.App.Runtime.win-x86>=11.0.0-preview.7.26381.103 <11.0.011.0.0

Linux distributions

DistributionReleasePackageFixed inAdvisory
Ubuntu22.04:LTSdotnet7no fix listedUBUNTU-CVE-2026-118748
Ubuntu22.04:LTSdotnet88.0.134-8.0.34-0ubuntu1~22.04.1USN-9042-1
Ubuntu24.04:LTSdotnet1010.0.115-10.0.15-0ubuntu1~24.04.1USN-9042-1
Ubuntu24.04:LTSdotnet88.0.134-8.0.34-0ubuntu1~24.04.1USN-9042-1
Ubuntu26.04:LTSdotnet1010.0.115-10.0.15-0ubuntu1~26.04.1USN-9042-1
Ubuntu26.10dotnet1010.0.115-10.0.15-0ubuntu1~26.10.1USN-9042-1
Ubuntu26.10dotnet1111.0.100-11.0.0-0ubuntu1~26.10.1UBUNTU-CVE-2026-118748 USN-9042-1

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

Red Hat

Red Hat rates this Important.

ProductPackageStateAdvisory
Red Hat Enterprise Linux 10dotnet11.0Affected
Red Hat Enterprise Linux 8dotnet11.0Affected
Red Hat Enterprise Linux 9dotnet11.0Affected

Contains Red Hat Security Data © Red Hat, Inc., licensed under CC BY 4.0. Source: https://access.redhat.com/security/data. Modified: reformatted. Red Hat's page for CVE-2026-118748.

Attack patterns (CAPEC)

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits. More on the page of CWE-770 (20).

References

Check your stackJSON