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Fencer Intel
high 7.5

CVE-2026-114154 json

ASP.NET Core Denial of Service Vulnerability

published yesterday modified 17h ago also EUVD-2026-121977 , GHSA-3893-7fxc-qvff

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Patch / fix

  • nuget Microsoft.AspNetCore.Server.HttpSys 2.3.14
  • nuget Microsoft.AspNetCore.App.Runtime.win-arm64 8.0.34, 9.0.23, 10.0.15
  • nuget Microsoft.AspNetCore.App.Runtime.win-x64 8.0.34, 9.0.23, 10.0.15
  • nuget Microsoft.AspNetCore.App.Runtime.win-x86 8.0.34, 9.0.23, 10.0.15
  • Microsoft .NET 10.0 installed on Windows 10.0.15
  • Microsoft .NET 8.0 installed on Windows 8.0.34
  • Microsoft .NET 9.0 installed on Windows 9.0.23
  • Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.45
  • Microsoft Microsoft Visual Studio 2026 version 18.11 18.11.4
  • Microsoft Microsoft.AspNetCore.Server.HttpSys 2.3.14

Is CVE-2026-114154 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
yesterday

Exploit prediction

1.30% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 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
GitHub 3.1 7.5 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
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
nuget Microsoft.AspNetCore.Server.HttpSys
>=2.3.10, <2.3.14
>=2.3.11, <2.3.14
>=2.3.12, <2.3.14
>=2.3.13, <2.3.14
2.3.14
nuget Microsoft.AspNetCore.App.Runtime.win-arm64
>=8.0.0, <8.0.34
>=9.0.0, <9.0.23
>=10.0.0, <10.0.15
8.0.34
9.0.23
10.0.15
nuget Microsoft.AspNetCore.App.Runtime.win-x64
>=8.0.0, <8.0.34
>=9.0.0, <9.0.23
>=10.0.0, <10.0.15
8.0.34
9.0.23
10.0.15
nuget Microsoft.AspNetCore.App.Runtime.win-x86
>=8.0.0, <8.0.34
>=9.0.0, <9.0.23
>=10.0.0, <10.0.15
8.0.34
9.0.23
10.0.15

Affected products

  • Microsoft .NET 10.0 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
  • Microsoft Microsoft.AspNetCore.Server.HttpSys

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.