CVE-2026-62900

Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.Build.Tasks.Git and Microsoft.SourceLink.AzureRepos.Git. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

Improper removal of sensitive information before storage or transfer in .NET allows an unauthorized attacker to disclose information over a network.

Announcement

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

CVSS Details

• Version: 3.1
• Severity: Medium
• Score: 5.9
• Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
• Weakness: CWE-212: Improper Removal of Sensitive Information Before Storage or Transfer

Affected Platforms

• Platforms: Windows, Linux, macOS
• Architectures: All

<a name="affected-packages"></a>Affected Packages

The vulnerability affects any Microsoft .NET project if it uses any of affected package versions listed below

<a name="published-nuget-packages"></a>Published NuGet packages

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- Microsoft.Build.Tasks.Git | = 8.0.0 | No patched NuGet version; update to a fixed .NET 8 SDK Microsoft.Build.Tasks.Git | >= 10.0.102, <= 10.0.110 | 10.0.111 Microsoft.Build.Tasks.Git | >= 10.0.200, <= 10.0.204 | No patched NuGet version; the 10.0.2xx SDK feature band is no longer serviced Microsoft.Build.Tasks.Git | >= 10.0.300, <= 10.0.301 | 10.0.303 Microsoft.SourceLink.AzureRepos.Git | = 8.0.0 | No patched NuGet version; update to a fixed .NET 8 SDK Microsoft.SourceLink.AzureRepos.Git | >= 10.0.102, <= 10.0.110 | 10.0.111 Microsoft.SourceLink.AzureRepos.Git | >= 10.0.200, <= 10.0.204 | No patched NuGet version; the 10.0.2xx SDK feature band is no longer serviced Microsoft.SourceLink.AzureRepos.Git | >= 10.0.300, <= 10.0.301 | 10.0.303

The affected packages used by .NET 8 and .NET 9 SDKs are built with SDK-specific prerelease versions that aren't published as stable NuGet packages. Update to SDK 8.0.130 or 8.0.424, SDK 9.0.120 or 9.0.317, or SDK 10.0.111 or 10.0.303 to receive the fix.

Advisory FAQ

<a name="how-affected"></a>How do I know if I am affected?

If using a package listed in affected packages, you're exposed to the vulnerability.

<a name="how-fix"></a>How do I fix the issue?

1. To fix the issue please install the latest version of .NET. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs.
2. If your application references the vulnerable package, update the package reference to the patched version. You can list the versions you have installed by running the dotnet --info command.

Once you have installed the updated runtime or SDK, restart your apps for the update to take effect.

Additionally, if you've deployed self-contained applications targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.

Other Information

Reporting Security Issues

If you have found a potential security issue in a supported version of .NET, please report it to the Microsoft Security Response Center (MSRC)…

.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: 8.0.130 Runtime version: 8.0.30

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 Vulnerability (CVE-2026-62901)

• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 8.0 to SDK 8.0.130 and Runtime 8.0.30 (JIRA:Rocky Linux-235468)

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 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: 8.0.130 Runtime version: 8.0.30

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 Vulnerability (CVE-2026-62901)

• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 8.0 to SDK 8.0.130 and Runtime 8.0.30 [rhel-10.2.z] (JIRA:Rocky Linux-235472)

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 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: 10.0.111 Runtime version: 10.0.11

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 Vulnerability (CVE-2026-62901)

• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 10.0 to SDK 10.0.111 and Runtime 10.0.11 (JIRA:Rocky Linux-235478)

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 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 Vulnerability (CVE-2026-62901)

• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 9.0 to SDK 9.0.120 and Runtime 9.0.19 (JIRA:Rocky Linux-235473)

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 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: 8.0.130 Runtime version: 8.0.30

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 Vulnerability (CVE-2026-62901)

• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 8.0 to SDK 8.0.130 and Runtime 8.0.30 [rhel-9.8.z] (JIRA:Rocky Linux-235471)

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 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 Vulnerability (CVE-2026-62901)

• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 9.0 to SDK 9.0.120 and Runtime 9.0.19 [rhel-10.2.z] (JIRA:Rocky Linux-235477)

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 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 Vulnerability (CVE-2026-62901)

• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 9.0 to SDK 9.0.120 and Runtime 9.0.19 [rhel-9.8.z] (JIRA:Rocky Linux-235476)

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 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: 10.0.111 Runtime version: 10.0.11

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 Vulnerability (CVE-2026-62901)

• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 10.0 to SDK 10.0.111 and Runtime 10.0.11 [rhel-9.8.z] (JIRA:Rocky Linux-235481)

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 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: 10.0.111 Runtime version: 10.0.11

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 Vulnerability (CVE-2026-62901)

• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 10.0 to SDK 10.0.111 and Runtime 10.0.11 [rhel-10.2.z] (JIRA:Rocky Linux-235482)

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.

Improper removal of sensitive information before storage or transfer in .NET allows an unauthorized attacker to disclose information over a network.

.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: 8.0.130
Runtime version: 8.0.30

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 Vulnerability (CVE-2026-62901)
• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 8.0 to SDK 8.0.130 and Runtime 8.0.30 (JIRA:AlmaLinux-235468)

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 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: 8.0.130
Runtime version: 8.0.30

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 Vulnerability (CVE-2026-62901)
• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 8.0 to SDK 8.0.130 and Runtime 8.0.30 [almalinux-10.2.z] (JIRA:AlmaLinux-235472)

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 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: 10.0.111
Runtime version: 10.0.11

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 Vulnerability (CVE-2026-62901)
• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 10.0 to SDK 10.0.111 and Runtime 10.0.11 (JIRA:AlmaLinux-235478)

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 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 Vulnerability (CVE-2026-62901)
• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 9.0 to SDK 9.0.120 and Runtime 9.0.19 (JIRA:AlmaLinux-235473)

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 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: 8.0.130
Runtime version: 8.0.30

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 Vulnerability (CVE-2026-62901)
• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 8.0 to SDK 8.0.130 and Runtime 8.0.30 [almalinux-9.8.z] (JIRA:AlmaLinux-235471)

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 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 Vulnerability (CVE-2026-62901)
• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 9.0 to SDK 9.0.120 and Runtime 9.0.19 [almalinux-10.2.z] (JIRA:AlmaLinux-235477)

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 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 Vulnerability (CVE-2026-62901)
• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 9.0 to SDK 9.0.120 and Runtime 9.0.19 [almalinux-9.8.z] (JIRA:AlmaLinux-235476)

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 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: 10.0.111
Runtime version: 10.0.11

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 Vulnerability (CVE-2026-62901)
• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 10.0 to SDK 10.0.111 and Runtime 10.0.11 [almalinux-9.8.z] (JIRA:AlmaLinux-235481)

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 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: 10.0.111
Runtime version: 10.0.11

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 Vulnerability (CVE-2026-62901)
• .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

Bug Fix(es) and Enhancement(s):

• Update .NET 10.0 to SDK 10.0.111 and Runtime 10.0.11 [almalinux-10.2.z] (JIRA:AlmaLinux-235482)

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.

Improper removal of sensitive information before storage or transfer in .NET allows an unauthorized attacker to disclose information over a network.

Improper removal of sensitive information before storage or transfer in .NET allows an unauthorized attacker to disclose information over a network.

Miha Zupan discovered that .NET did not properly interpret certain HTTP requests. An attacker could possibly use this issue to perform request smuggling and bypass a security feature. (CVE-2026-62899)

Ivan Demchuk discovered that .NET did not properly handle the removal of sensitive information before storage or transfer. An attacker could possibly use this issue to disclose sensitive information. (CVE-2026-62900)

Kevin Gosse discovered that .NET did not properly check an input for a loop condition. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-62901)

Kevin Gosse discovered that .NET did not properly perform error checking when securing shared resources used for diagnostics IPC. An attacker could possibly use this issue to elevate privileges. (CVE-2026-62909)