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Microsoft Security Advisory CVE-2026-109476 - ASP.NET Core Information Disclosure Vulnerability

🗓️ 10 Nov 2026 23:02:40Reported by GitHub Advisory DatabaseType 
github
 github🔗 github.com👁 4 Views

Crafted X-Forwarded-Prefix in ASP.NET Core can inject cookie path delimiters.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
circl
Circl		CVE-2026-109476
10 Nov 202612:38
–circl
cve
CVE		CVE-2026-109476
10 Nov 202618:15
–cve
cvelist
Cvelist		CVE-2026-109476 ASP.NET Core Information Disclosure Vulnerability
10 Nov 202618:15
–cvelist
euvd
EUVD		EUVD-2026-121560
10 Nov 202618:15
–euvd
mskb
Microsoft KB		.NET 10.0 Update - November 10, 2026
10 Nov 202616:00
–mskb
mskb
Microsoft KB		.NET 9.0 Update - November 10, 2026
10 Nov 202616:00
–mskb
mskb
Microsoft KB		.NET 8.0 Update - November 10, 2026
10 Nov 202616:00
–mskb
mscve
Microsoft CVE		ASP.NET Core Information Disclosure Vulnerability
10 Nov 202616:00
–mscve
ncsc
NCSC		Vulnerabilities fixed in Microsoft Developer Tools
10 Nov 202619:38
–ncsc
nvd
NVD		CVE-2026-109476
10 Nov 202619:18
–nvd
Rows per page
Vulners
Node
OR
microsoftaspnetcore.app.runtime.win-x86Range11.0.0-preview.1.26104.118–11.0.0-rc.3.26522.148nuget
microsoftaspnetcore.app.runtime.win-x64Range11.0.0-preview.1.26104.118–11.0.0-rc.3.26522.148nuget
microsoftaspnetcore.app.runtime.win-arm64Range11.0.0-preview.1.26104.118–11.0.0-rc.3.26522.148nuget
microsoftaspnetcore.app.runtime.osx-x64Range11.0.0-preview.1.26104.118–11.0.0-rc.3.26522.148nuget
microsoftaspnetcore.app.runtime.osx-arm64Range11.0.0-preview.1.26104.118–11.0.0-rc.3.26522.148nuget
microsoftaspnetcore.app.runtime.linux-x64Range11.0.0-preview.1.26104.118–11.0.0-rc.3.26522.148nuget
microsoftaspnetcore.app.runtime.linux-musl-x64Range11.0.0-preview.1.26104.118–11.0.0-rc.3.26522.148nuget
microsoftaspnetcore.app.runtime.linux-musl-arm64Range11.0.0-preview.1.26104.118–11.0.0-rc.3.26522.148nuget
microsoftaspnetcore.app.runtime.linux-musl-armRange11.0.0-preview.1.26104.118–11.0.0-rc.3.26522.148nuget
microsoftaspnetcore.app.runtime.linux-arm64Range11.0.0-preview.1.26104.118–11.0.0-rc.3.26522.148nuget
microsoftaspnetcore.app.runtime.linux-armRange11.0.0-preview.1.26104.118–11.0.0-rc.3.26522.148nuget
microsoftaspnetcore.app.runtime.win-x86Range10.0.0-preview.1.25120.3–10.0.14nuget
microsoftaspnetcore.app.runtime.win-x64Range10.0.0-preview.1.25120.3–10.0.14nuget
microsoftaspnetcore.app.runtime.win-arm64Range10.0.0-preview.1.25120.3–10.0.14nuget
microsoftaspnetcore.app.runtime.osx-x64Range10.0.0-preview.1.25120.3–10.0.14nuget
microsoftaspnetcore.app.runtime.osx-arm64Range10.0.0-preview.1.25120.3–10.0.14nuget
microsoftaspnetcore.app.runtime.linux-x64Range10.0.0-preview.1.25120.3–10.0.14nuget
microsoftaspnetcore.app.runtime.linux-musl-x64Range10.0.0-preview.1.25120.3–10.0.14nuget
microsoftaspnetcore.app.runtime.linux-musl-arm64Range10.0.0-preview.1.25120.3–10.0.14nuget
microsoftaspnetcore.app.runtime.linux-musl-armRange10.0.0-preview.1.25120.3–10.0.14nuget
microsoftaspnetcore.app.runtime.linux-arm64Range10.0.0-preview.1.25120.3–10.0.14nuget
microsoftaspnetcore.app.runtime.linux-armRange10.0.0-preview.1.25120.3–10.0.14nuget
microsoftaspnetcore.app.runtime.win-x86Range9.0.0-preview.1.24081.5–9.0.22nuget
microsoftaspnetcore.app.runtime.win-x64Range9.0.0-preview.1.24081.5–9.0.22nuget
microsoftaspnetcore.app.runtime.win-arm64Range9.0.0-preview.1.24081.5–9.0.22nuget
microsoftaspnetcore.app.runtime.osx-x64Range9.0.0-preview.1.24081.5–9.0.22nuget
microsoftaspnetcore.app.runtime.osx-arm64Range9.0.0-preview.1.24081.5–9.0.22nuget
microsoftaspnetcore.app.runtime.linux-x64Range9.0.0-preview.1.24081.5–9.0.22nuget
microsoftaspnetcore.app.runtime.linux-musl-x64Range9.0.0-preview.1.24081.5–9.0.22nuget
microsoftaspnetcore.app.runtime.linux-musl-arm64Range9.0.0-preview.1.24081.5–9.0.22nuget
microsoftaspnetcore.app.runtime.linux-musl-armRange9.0.0-preview.1.24081.5–9.0.22nuget
microsoftaspnetcore.app.runtime.linux-arm64Range9.0.0-preview.1.24081.5–9.0.22nuget
microsoftaspnetcore.app.runtime.linux-armRange9.0.0-preview.1.24081.5–9.0.22nuget
microsoftaspnetcore.app.runtime.win-x86Range8.0.0-rc.1.23421.29–8.0.33nuget
microsoftaspnetcore.app.runtime.win-x64Range8.0.0-rc.1.23421.29–8.0.33nuget
microsoftaspnetcore.app.runtime.win-arm64Range8.0.0-rc.1.23421.29–8.0.33nuget
microsoftaspnetcore.app.runtime.osx-x64Range8.0.0-rc.1.23421.29–8.0.33nuget
microsoftaspnetcore.app.runtime.osx-arm64Range8.0.0-rc.1.23421.29–8.0.33nuget
microsoftaspnetcore.app.runtime.linux-x64Range8.0.0-rc.1.23421.29–8.0.33nuget
microsoftaspnetcore.app.runtime.linux-musl-x64Range8.0.0-rc.1.23421.29–8.0.33nuget
microsoftaspnetcore.app.runtime.linux-musl-arm64Range8.0.0-rc.1.23421.29–8.0.33nuget
microsoftaspnetcore.app.runtime.linux-musl-armRange8.0.0-rc.1.23421.29–8.0.33nuget
microsoftaspnetcore.app.runtime.linux-arm64Range8.0.0-rc.1.23421.29–8.0.33nuget
microsoftaspnetcore.app.runtime.linux-armRange8.0.0-rc.1.23421.29–8.0.33nuget

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10 Nov 2026 23:02Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.16.1
CWE-116
ASP.NET CoreX-Forwarded-Prefixcookie pathinformation disclosure
4