CVE-2026-69304

Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69304	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:microsoft:asp.net_core::::::::
	cpe:2.3:a:microsoft:asp.net_core::::::::
	cpe:2.3:a:microsoft:asp.net_core::::::::
	cpe:2.3:a:microsoft:asp.net_core::::::::
	cpe:2.3:a:microsoft:asp.net_core:11.0:rc1::::::
	cpe:2.3:a:microsoft:visual_studio_2022::::::::
	cpe:2.3:a:microsoft:visual_studio_2026::::::::

Configuration 2 (hide)

AND

OR	cpe:2.3:a:microsoft:.net::::::::
	cpe:2.3:a:microsoft:.net::::::::
	cpe:2.3:a:microsoft:.net::::::::

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

History

30 Sep 2026, 20:49

Type	Values Removed	Values Added
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69304 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69304 - Patch, Vendor Advisory
CPE		cpe:2.3:o:microsoft:windows:-:::::::* cpe:2.3:a:microsoft:asp.net_core:11.0:rc1:::::: cpe:2.3:a:microsoft:.net:::::::: cpe:2.3:a:microsoft:visual_studio_2022:::::::: cpe:2.3:a:microsoft:asp.net_core:::::::: cpe:2.3:a:microsoft:visual_studio_2026::::::::
First Time		Microsoft windows Microsoft visual Studio 2022 Microsoft .net Microsoft asp.net Core Microsoft Microsoft visual Studio 2026

Information

Published : 2026-09-08 18:18

Updated : 2026-10-30 22:17

NVD link : CVE-2026-69304

Mitre link : CVE-2026-69304

CVE.ORG link : CVE-2026-69304

JSON object : View

Products Affected

microsoft

asp.net_core
windows
visual_studio_2022
visual_studio_2026
.net

CWE

CWE-409

Improper Handling of Highly Compressed Data (Data Amplification)

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"custom"}]}, {"vendor": "Microsoft", "product": "ASP.NET Core 11.0", "versions": [{"status": "affected", "version": "11.0", "lessThan": "11.0 RC1", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "ASP.NET Core 8.0", "versions": [{"status": "affected", "version": "8.0", "lessThan": "8.0.31", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "ASP.NET Core 9.0", "versions": [{"status": "affected", "version": "9.0", "lessThan": "9.0.20", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2022 version 17.14", "versions": [{"status": "affected", "version": "17.14.0", "lessThan": "17.14.40", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2026 version 18.9", "versions": [{"status": "affected", "version": "18.9.0", "lessThan": "18.9.3", "versionType": "custom"}]}]}], "published": "2026-09-08T18:18:46.347", "references": [{"url": 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