CVE-2026-109476: ASP.NET Core Information Disclosure Vulnerability

Published Nov 10, 2026
·
Updated

ASP.NET Core Information Disclosure Vulnerability

Other sources

Improper encoding or escaping of output in ASP.NET Core allows an unauthorized attacker to disclose information over a network.

— Microsoft

Affected Software

27 affected componentsFixes available
All of the following
Microsoft .NET>=11.0<11.0.0
11.0.0
Apple macOS*
Microsoft Visual Studio 2026>=18.11<18.11.4
18.11.4
Microsoft Visual Studio 2022>=17.14<17.14.45
17.14.45
All of the following
Microsoft .NET>=10.0<10.0.15
10.0.15
Microsoft Windows*
All of the following
Microsoft .NET>=11.0<11.0.0
11.0.0
Linux Linux*
All of the following
Microsoft .NET>=10.0<10.0.15
10.0.15
Linux Linux*
All of the following
Microsoft .NET>=11.0<11.0.0
11.0.0
Microsoft Windows*
All of the following
Microsoft .NET>=9.0<9.0.23
9.0.23
Apple macOS*
All of the following
Microsoft .NET>=8.0<8.0.34
8.0.34
Microsoft Windows*
All of the following
Microsoft .NET>=8.0<8.0.34
8.0.34
Linux Linux*
All of the following
Microsoft .NET>=8.0<8.0.34
8.0.34
Apple macOS*
All of the following
Microsoft .NET>=10.0<10.0.15
10.0.15
Apple macOS*
Microsoft Visual Studio 2026>=18.12<18.12.0
18.12.0
All of the following
Microsoft .NET>=9.0<9.0.23
9.0.23
Microsoft Windows*
All of the following
Microsoft .NET>=9.0<9.0.23
9.0.23
Linux Linux*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.0.0
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 17.14.45
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 18.11.4
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.15Patch KB5135241
  5. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 8.0.34Patch KB5135243
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 9.0.23Patch KB5135242
  7. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 18.12.0

Event History

Nov 10, 2026
CVE Published
via Microsoft·04:00 PM
Data Sourced
via Microsoft·04:00 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·06:15 PM
Data Sourced
via MITRE·06:15 PM
DescriptionSeverity
Data Sourced
via NVD·07:18 PM
DescriptionSeverityWeakness

Company

Resources

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