Critical: .NET 9.0 security, bug fix, and enhancement update
.NET is a fast, lightweight and modular platform for creating cross platform applications that work on Linux, macOS and Windows. It particularly focuses on creating console applications, web applications and micro-services. .NET contains a runtime conforming to .NET Standards a set of framework libraries, an SDK containing compilers and a 'dotnet' application to drive everything.
SDK version: 9.0.122
Runtime version: 9.0.21
Security Fix(es):
* dotnet10.0: dotnet9.0: dotnet: dotnet8.0: .NET Denial of Service Vulnerability (CVE-2026-58280)
* dotnet10.0: dotnet8.0: dotnet9.0: dotnet: .NET Information Disclosure Vulnerability (CVE-
Important: .NET 9.0 security, bug fix, and enhancement update
.NET is a fast, lightweight and modular platform for creating cross platform applications that work on Linux, macOS and Windows. It particularly focuses on creating console applications, web applications and micro-services. .NET contains a runtime conforming to .NET Standards a set of framework libraries, an SDK containing compilers and a 'dotnet' application to drive everything.
SDK version: 9.0.121
Runtime version: 9.0.20
Security Fix(es):
* dotnet10.0: dotnet9.0: dotnet8.0: .NET Information Disclosure Vulnerability (CVE-2026-58649)
* dotnet10.0: dotnet9.0: .NET Elevation of Privilege Vulnerability (CVE-2026-69806)
Bug Fix(
Important: .NET 9.0 security, bug fix, and enhancement update
.NET is a fast, lightweight and modular platform for creating cross platform applications that work on Linux, macOS and Windows. It particularly focuses on creating console applications, web applications and micro-services. .NET contains a runtime conforming to .NET Standards a set of framework libraries, an SDK containing compilers and a 'dotnet' application to drive everything.
SDK version: 9.0.120
Runtime version: 9.0.19
Security Fix(es):
* .NET: .NET Core: .NET Security Feature Bypass Vulnerability (CVE-2026-62899)
* .NET: .NET Information Disclosure Vulnerability (CVE-2026-62900)
* .NET: .NET Denial of Service Vulnerabil
Important: .NET 9.0 security, bug fix, and enhancement update
.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.
New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.119 and .NET Runtime 9.0.18.
Security Fix(es):
* dotnet: SocketsHttpHandler Http2Connection - HTTP/2 SETTINGS/PING ACK flood causing OOM (CVE-2026-50651)
* dotnet: .NET Core: Denial of Service via type confusion (CVE-2026-57108)
* ASP.NET Core: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-56170)
* ASP.NET Core: ASP.NET Core: Privileg
.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.
New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.118 and .NET Runtime 9.0.17.Security Fix(es):
* dotnet: .NET: Local file tampering via link following vulnerability (CVE-2026-45491)
* dotnet: ASP.NET Core: Denial of Service via uncontrolled resource consumption (CVE-2026-45591)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the C
.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.
New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.117 and .NET Runtime 9.0.16.Security Fix(es):
* dotnet: .NET: infinite loop allows an attacker to cause a denial of service (CVE-2026-42899)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.
New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.116 and .NET Runtime 9.0.15.Security Fix(es):
* dotnet: .NET: Security Bypass and Denial of Service Vulnerability (CVE-2026-26171)
* dotnet: .NET: Denial of Service via stack overflow (CVE-2026-32203)
* dotnet: .NET: Denial of Service via Infinite Recursion in XmlDecryptionTransform (CVE-2026-33116)
* dotnet: Dotnet: SMTP Command Injection and Header Injection via MailA
.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.
New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.115 and .NET Runtime 9.0.14.Security Fix(es):
* .net: .NET: Denial of Service via out-of-bounds read (CVE-2026-26127)
* asp.net: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-26130)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) list
.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.
New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.111 and .NET Runtime 9.0.10.Security Fix(es):
* dotnet: .NET Information Disclosure Vulnerability (CVE-2025-55248)
* dotnet: .NET Security Feature Bypass Vulnerability (CVE-2025-55315)
* dotnet: .NET Denial of Service Vulnerability (CVE-2025-55247)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related inform
.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.
New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.107 and .NET Runtime 9.0.6.Security Fix(es):
* dotnet: .NET Remote Code Vulnerability (CVE-2025-30399)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.
New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.106 and .NET Runtime 9.0.5.Security Fix(es):
* dotnet: .NET and Visual Studio Spoofing Vulnerability (CVE-2025-26646)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Important: .NET 9.0 security, bug fix, and enhancement update
.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.
New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.104 and .NET Runtime 9.0.3.Security Fix(es):
* dotnet: Privilege Escalation Vulnerability in .NET SignInManager.RefreshSignInAsync Method (CVE-2025-24070)
Bug Fix(es) and Enhancement(s):
* dotnet: Privilege Escalation Vulnerability in .NET SignInManager.RefreshSignInAsync Method (BZ#2349733)
For more details about the security issue(s), including the impact, a CVSS s
.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.
New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.102 and .NET Runtime 9.0.1.
Security Fix(es):
* dotnet: .NET Remote Code Execution Vulnerability (CVE-2025-21171)
* dotnet: .NET and Visual Studio Remote Code Execution Vulnerability (CVE-2025-21172)
* dotnet: .NET Elevation of Privilege Vulnerability (CVE-2025-21173)
* dotnet: .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability (CVE-2025-2117