Vulnerability DatabaseCVE-2026-69304
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CVE-2026-69304
Published:September 08, 2026
Updated:September 22, 2026
Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Affected Packages
microsoft.aspnetcore.app.runtime.win-x64 (NUGET):
Affected version(s) >=8.0.0 <8.0.31
Fix Suggestion:
Update to version 8.0.31
microsoft.aspnetcore.app.runtime.win-x64 (NUGET):
Affected version(s) >=9.0.0 <9.0.20
Fix Suggestion:
Update to version 9.0.20
microsoft.aspnetcore.app.runtime.win-arm64 (NUGET):
Affected version(s) >=10.0.0 <10.0.12
Fix Suggestion:
Update to version 10.0.12
microsoft.aspnetcore.app.runtime.win-arm64 (NUGET):
Affected version(s) >=9.0.0 <9.0.20
Fix Suggestion:
Update to version 9.0.20
microsoft.aspnetcore.app.runtime.win-x86 (NUGET):
Affected version(s) >=8.0.0 <8.0.31
Fix Suggestion:
Update to version 8.0.31
microsoft.aspnetcore.app.runtime.win-x86 (NUGET):
Affected version(s) >=11.0.0-preview.1.26104.118 <11.0.0-rc.1.26425.128
Fix Suggestion:
Update to version 11.0.0-rc.1.26425.128
microsoft.aspnetcore.app.runtime.win-arm64 (NUGET):
Affected version(s) >=8.0.0 <8.0.31
Fix Suggestion:
Update to version 8.0.31
microsoft.aspnetcore.app.runtime.win-arm64 (NUGET):
Affected version(s) >=11.0.0-preview.1.26104.118 <11.0.0-rc.1.26425.128
Fix Suggestion:
Update to version 11.0.0-rc.1.26425.128
microsoft.aspnetcore.app.runtime.win-x86 (NUGET):
Affected version(s) >=10.0.0 <10.0.12
Fix Suggestion:
Update to version 10.0.12
microsoft.aspnetcore.app.runtime.win-x86 (NUGET):
Affected version(s) >=9.0.0 <9.0.20
Fix Suggestion:
Update to version 9.0.20
microsoft.aspnetcore.app.runtime.win-x64 (NUGET):
Affected version(s) >=10.0.0 <10.0.12
Fix Suggestion:
Update to version 10.0.12
microsoft.aspnetcore.app.runtime.win-x64 (NUGET):
Affected version(s) >=11.0.0-preview.1.26104.118 <11.0.0-rc.1.26425.128
Fix Suggestion:
Update to version 11.0.0-rc.1.26425.128
Related Resources (4)
https://nvd.nist.gov/vuln/detail/CVE-2026-69304
https://github.com/dotnet/aspnetcore
https://github.com/dotnet/aspnetcore/security/advisories/GHSA-8cp2-47hg-mfgh
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69304
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CVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Exploit Maturity
UNPROVEN
Weakness Type (CWE)
Improper Handling of Highly Compressed Data (Data Amplification)
CWE-409
EPSS
Base Score:
0.77