CVE-2026-69304

ASP.NET Core Denial of Service Vulnerability

CVSS score

5.9

EPSS probability

%0.9

Risk score

0.1

Published

1 mo ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-69304 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-69304 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	microsoft	.NET 10.0	View
2	microsoft	.NET 8.0	View
3	microsoft	.NET 9.0	View
4	microsoft	ASP.NET Core 10.0	View
5	microsoft	ASP.NET Core 11.0	View
6	microsoft	ASP.NET Core 8.0	View
7	microsoft	ASP.NET Core 9.0	View
8	microsoft	Microsoft Visual Studio 2022 version 17.14	View
9	microsoft	Microsoft Visual Studio 2026 version 18.9	View
10	microsoft	asp.net core	View
11	microsoft	asp.net core	View
12	microsoft	asp.net core	View
13	microsoft	asp.net core	View
14	microsoft	asp.net core	View
15	microsoft	visual studio 2022	View
16	microsoft	visual studio 2026	View
17	microsoft	.net	View
18	microsoft	.net	View
19	microsoft	.net	View
20	microsoft	windows	View
21	nuget	Microsoft.AspNetCore.Server.IISIntegration	View
22	nuget	Microsoft.AspNetCore.Server.IISIntegration	View
23	nuget	Microsoft.AspNetCore.Server.IISIntegration	View
24	nuget	Microsoft.AspNetCore.Server.IISIntegration	View
25	nuget	Microsoft.AspNetCore.Server.IISIntegration	View

Total affected vendors: 2|Products: 25

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
5.9	CVSS V31	MEDIUM	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD
5.9	CVSS 3.x	—	Vector not published	GitHub Advisory
5.9	CVSS V3_1	MEDIUM	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C	CVE CNA
0.0	CVSS 4.0	—	Vector not published	GitHub Advisory

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

7 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source

cvelist

ASP.NET Core Denial of Service Vulnerability

Open source

gitlabnuget/Microsoft.AspNetCore.Server.IISIntegration8.0.31

GitLab Advisory düzeltilmiş sürüm: 8.0.31

gitlabnuget/Microsoft.AspNetCore.Server.IISIntegration9.0.20

GitLab Advisory düzeltilmiş sürüm: 9.0.20

gitlabnuget/Microsoft.AspNetCore.Server.IISIntegration10.0.12

GitLab Advisory düzeltilmiş sürüm: 10.0.12

gitlabnuget/Microsoft.AspNetCore.Server.IISIntegration11.0.0-rc.1

GitLab Advisory düzeltilmiş sürüm: 11.0.0-rc.1

gitlab

Upgrade to versions 8.0.31, 9.0.20, 10.0.12, 11.0.0-rc.1 or above.

reference

ASP.NET Core Denial of Service Vulnerability

Open source

canonical

Upgrade to versions 8.0.31, 9.0.20, 10.0.12, 11.0.0-rc.1 or above.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Apply the official update named in the evidence only to the matching product and version.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-69304 is associated with the following CWEs:

CWE-409: Common Weakness Enumeration Entry CWE-409 CWE-937: Common Weakness Enumeration Entry CWE-937 CWE-1035: Common Weakness Enumeration Entry CWE-1035

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-69304 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

ASP.NET Core Denial of Service Vulnerabilitypatch https://github.com/dotnet/aspnetcore/security/advisories/GHSA-8cp2-47hg-mfghvendor-advisory https://nvd.nist.gov/vuln/detail/CVE-2026-69304vendor-advisory https://github.com/advisories/GHSA-8cp2-47hg-mfghvendor-advisory

CVSS Vector Radar Chart

5.9 / 10

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)High

Integrity (Bütünlük)None

Availability (Erişilebilirlik)High

Yama doğrulandı

7 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

microsoft

nuget

Weakness Type (CWE & CAPEC)

CWE-409 CWE-937 CWE-1035

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Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

Get a free key Documentation

curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2026-69304"

ASP.NET Core Denial of Service Vulnerability

Impact on My Inventory

Vulnerability description

IMPACT: Affected Products and Software

Affected Products

RED HAT CSAF/VEX: Product Impact Check

SCORING: CVSS from Multiple Sources

CVSS Scores

Patch and Remediation Guide

Solution & Remediation Advisory

Public exploit and active exploitation status

Verified exploit intelligence

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

Common Attack Pattern Enumeration and Classification (CAPEC)

Attack Vector and Accessibility

Official Sources and Advisories

CVSS Vector Radar Chart

Vulnerability Scoring Details

Weakness Type (CWE & CAPEC)

Similar Vulnerabilities

Get this vulnerability through the API

DayBreach

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