CVE-2026-57108: Microsoft Security Advisory CVE-2026-57108 – .NET Denial of Service Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in the .NET runtime cryptography layer (CryptoNative_GetX509NameInfo). This advisory also provides guidance on…

7.5CVSS Score

HIGHSeverity

NOCISA KEV

1.1%EPSS Score

VulnerabilityImpact Type

📋 Vulnerability Details

CVE ID	CVE-2026-57108
Vendor	nuget
Affected Product	Microsoft.NetCore.App.Runtime.linux-arm
Vulnerability Type	Vulnerability
CVSS Score	7.5 (HIGH)
EPSS Score	1.1% probability of exploitation in the next 30 days
Actively Exploited	❌ No known exploitation
Patch Status	See Vendor Advisory →
Reported By	CYBERDUDEBIVASH SENTINEL APEX Intelligence (via github_advisories)

🔬 Technical Analysis

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in the .NET runtime cryptography layer (CryptoNative_GetX509NameInfo). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service vulnerability exists in the .NET 8, .NET 9, and .NET 10 runtime when parsing X.509 certificates. A specially crafted certificate could allow an attacker to cause a denial of service.

Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/TBD

CVSS Details - Version: 3.1

• Severity: High

• Score: 7.5

• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

• Weakness: CWE-843 (Access of Resource

🎯 Known Indicators of Compromise

{"type":"url","value":"https://github.com/dotnet/announcements/issues/**TBD**","confidence_score":0.82,"first_seen":"2026-07-20","source_count":1}

📚 Advisory References

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