Vulnerability · Published Oct 13, 2026 · Assigned by microsoft

CVE-2026-66822.NET Information Disclosure Vulnerability

Medium 5.9

In plain English

A medium-severity security flaw in Microsoft Visual Studio 2022 version 17.14 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.8%top 43.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Insertion of sensitive information into sent data in .NET allows an unauthorized attacker to disclose information over a network.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10aspnetcore-runtime-10.010.0.13-1.el10_2ALSA-2026:86195
AlmaLinux:8aspnetcore-runtime-10.010.0.13-1.el8_10ALSA-2026:86192
AlmaLinux:9aspnetcore-runtime-10.010.0.13-1.el9_8ALSA-2026:86193
AlmaLinux:10aspnetcore-runtime-8.08.0.32-1.el10_2ALSA-2026:86168
AlmaLinux:8aspnetcore-runtime-8.08.0.32-2.el8_10ALSA-2026:86594
AlmaLinux:9aspnetcore-runtime-8.08.0.32-1.el9_8ALSA-2026:86169
AlmaLinux:10aspnetcore-runtime-9.09.0.21-1.el10_2ALSA-2026:86172
AlmaLinux:8aspnetcore-runtime-9.09.0.21-1.el8_10ALSA-2026:86170
AlmaLinux:9aspnetcore-runtime-9.09.0.21-1.el9_8ALSA-2026:86171
AlmaLinux:10aspnetcore-runtime-dbg-10.010.0.13-1.el10_2ALSA-2026:86195
AlmaLinux:8aspnetcore-runtime-dbg-10.010.0.13-1.el8_10ALSA-2026:86192
AlmaLinux:9aspnetcore-runtime-dbg-10.010.0.13-1.el9_8ALSA-2026:86193
AlmaLinux:10aspnetcore-runtime-dbg-8.08.0.32-1.el10_2ALSA-2026:86168
AlmaLinux:8aspnetcore-runtime-dbg-8.08.0.32-2.el8_10ALSA-2026:86594
AlmaLinux:9aspnetcore-runtime-dbg-8.08.0.32-1.el9_8ALSA-2026:86169
AlmaLinux:10aspnetcore-runtime-dbg-9.09.0.21-1.el10_2ALSA-2026:86172
AlmaLinux:8aspnetcore-runtime-dbg-9.09.0.21-1.el8_10ALSA-2026:86170
AlmaLinux:9aspnetcore-runtime-dbg-9.09.0.21-1.el9_8ALSA-2026:86171
AlmaLinux:10aspnetcore-targeting-pack-10.010.0.13-1.el10_2ALSA-2026:86195
AlmaLinux:8aspnetcore-targeting-pack-10.010.0.13-1.el8_10ALSA-2026:86192
AlmaLinux:9aspnetcore-targeting-pack-10.010.0.13-1.el9_8ALSA-2026:86193
AlmaLinux:10aspnetcore-targeting-pack-8.08.0.32-1.el10_2ALSA-2026:86168
AlmaLinux:8aspnetcore-targeting-pack-8.08.0.32-2.el8_10ALSA-2026:86594
AlmaLinux:9aspnetcore-targeting-pack-8.08.0.32-1.el9_8ALSA-2026:86169
AlmaLinux:10aspnetcore-targeting-pack-9.09.0.21-1.el10_2ALSA-2026:86172
AlmaLinux:8aspnetcore-targeting-pack-9.09.0.21-1.el8_10ALSA-2026:86170
AlmaLinux:9aspnetcore-targeting-pack-9.09.0.21-1.el9_8ALSA-2026:86171
AlmaLinux:8dotnet10.0.113-1.el8_10ALSA-2026:86192
AlmaLinux:10dotnet-apphost-pack-10.010.0.13-1.el10_2ALSA-2026:86195
AlmaLinux:8dotnet-apphost-pack-10.010.0.13-1.el8_10ALSA-2026:86192
AlmaLinux:9dotnet-apphost-pack-10.010.0.13-1.el9_8ALSA-2026:86193
AlmaLinux:10dotnet-apphost-pack-8.08.0.32-1.el10_2ALSA-2026:86168
AlmaLinux:8dotnet-apphost-pack-8.08.0.32-2.el8_10ALSA-2026:86594
AlmaLinux:9dotnet-apphost-pack-8.08.0.32-1.el9_8ALSA-2026:86169
AlmaLinux:10dotnet-apphost-pack-9.09.0.21-1.el10_2ALSA-2026:86172
AlmaLinux:8dotnet-apphost-pack-9.09.0.21-1.el8_10ALSA-2026:86170
AlmaLinux:9dotnet-apphost-pack-9.09.0.21-1.el9_8ALSA-2026:86171
AlmaLinux:10dotnet-host10.0.13-1.el10_2ALSA-2026:86195
AlmaLinux:9dotnet-host10.0.13-1.el9_8ALSA-2026:86193
AlmaLinux:10dotnet-hostfxr-10.010.0.13-1.el10_2ALSA-2026:86195
AlmaLinux:8dotnet-hostfxr-10.010.0.13-1.el8_10ALSA-2026:86192
AlmaLinux:9dotnet-hostfxr-10.010.0.13-1.el9_8ALSA-2026:86193
AlmaLinux:10dotnet-hostfxr-8.08.0.32-1.el10_2ALSA-2026:86168
AlmaLinux:8dotnet-hostfxr-8.08.0.32-2.el8_10ALSA-2026:86594
AlmaLinux:9dotnet-hostfxr-8.08.0.32-1.el9_8ALSA-2026:86169
AlmaLinux:10dotnet-hostfxr-9.09.0.21-1.el10_2ALSA-2026:86172
AlmaLinux:8dotnet-hostfxr-9.09.0.21-1.el8_10ALSA-2026:86170
AlmaLinux:9dotnet-hostfxr-9.09.0.21-1.el9_8ALSA-2026:86171
AlmaLinux:10dotnet-runtime-10.010.0.13-1.el10_2ALSA-2026:86195
AlmaLinux:8dotnet-runtime-10.010.0.13-1.el8_10ALSA-2026:86192
AlmaLinux:9dotnet-runtime-10.010.0.13-1.el9_8ALSA-2026:86193
AlmaLinux:10dotnet-runtime-8.08.0.32-1.el10_2ALSA-2026:86168
AlmaLinux:8dotnet-runtime-8.08.0.32-2.el8_10ALSA-2026:86594
AlmaLinux:9dotnet-runtime-8.08.0.32-1.el9_8ALSA-2026:86169
AlmaLinux:10dotnet-runtime-9.09.0.21-1.el10_2ALSA-2026:86172
AlmaLinux:8dotnet-runtime-9.09.0.21-1.el8_10ALSA-2026:86170
AlmaLinux:9dotnet-runtime-9.09.0.21-1.el9_8ALSA-2026:86171
AlmaLinux:10dotnet-runtime-dbg-10.010.0.13-1.el10_2ALSA-2026:86195
AlmaLinux:8dotnet-runtime-dbg-10.010.0.13-1.el8_10ALSA-2026:86192
AlmaLinux:9dotnet-runtime-dbg-10.010.0.13-1.el9_8ALSA-2026:86193
AlmaLinux:10dotnet-runtime-dbg-8.08.0.32-1.el10_2ALSA-2026:86168
AlmaLinux:8dotnet-runtime-dbg-8.08.0.32-2.el8_10ALSA-2026:86594
AlmaLinux:9dotnet-runtime-dbg-8.08.0.32-1.el9_8ALSA-2026:86169
AlmaLinux:10dotnet-runtime-dbg-9.09.0.21-1.el10_2ALSA-2026:86172
AlmaLinux:8dotnet-runtime-dbg-9.09.0.21-1.el8_10ALSA-2026:86170
AlmaLinux:9dotnet-runtime-dbg-9.09.0.21-1.el9_8ALSA-2026:86171
AlmaLinux:10dotnet-sdk-10.010.0.113-1.el10_2ALSA-2026:86195
AlmaLinux:8dotnet-sdk-10.010.0.113-1.el8_10ALSA-2026:86192
AlmaLinux:9dotnet-sdk-10.010.0.113-1.el9_8ALSA-2026:86193
AlmaLinux:10dotnet-sdk-10.0-source-built-artifacts10.0.113-1.el10_2ALSA-2026:86195
AlmaLinux:8dotnet-sdk-10.0-source-built-artifacts10.0.113-1.el8_10ALSA-2026:86192
AlmaLinux:9dotnet-sdk-10.0-source-built-artifacts10.0.113-1.el9_8ALSA-2026:86193
AlmaLinux:10dotnet-sdk-8.08.0.132-1.el10_2ALSA-2026:86168
AlmaLinux:8dotnet-sdk-8.08.0.132-2.el8_10ALSA-2026:86594
AlmaLinux:9dotnet-sdk-8.08.0.132-1.el9_8ALSA-2026:86169
AlmaLinux:10dotnet-sdk-8.0-source-built-artifacts8.0.132-1.el10_2ALSA-2026:86168
AlmaLinux:8dotnet-sdk-8.0-source-built-artifacts8.0.132-2.el8_10ALSA-2026:86594
AlmaLinux:9dotnet-sdk-8.0-source-built-artifacts8.0.132-1.el9_8ALSA-2026:86169
AlmaLinux:10dotnet-sdk-9.09.0.122-1.el10_2ALSA-2026:86172
AlmaLinux:8dotnet-sdk-9.09.0.122-1.el8_10ALSA-2026:86170
AlmaLinux:9dotnet-sdk-9.09.0.122-1.el9_8ALSA-2026:86171
AlmaLinux:10dotnet-sdk-9.0-source-built-artifacts9.0.122-1.el10_2ALSA-2026:86172
AlmaLinux:8dotnet-sdk-9.0-source-built-artifacts9.0.122-1.el8_10ALSA-2026:86170
AlmaLinux:9dotnet-sdk-9.0-source-built-artifacts9.0.122-1.el9_8ALSA-2026:86171
AlmaLinux:10dotnet-sdk-aot-10.010.0.113-1.el10_2ALSA-2026:86195
AlmaLinux:8dotnet-sdk-aot-10.010.0.113-1.el8_10ALSA-2026:86192
AlmaLinux:9dotnet-sdk-aot-10.010.0.113-1.el9_8ALSA-2026:86193
AlmaLinux:10dotnet-sdk-aot-9.09.0.122-1.el10_2ALSA-2026:86172
AlmaLinux:8dotnet-sdk-aot-9.09.0.122-1.el8_10ALSA-2026:86170
AlmaLinux:9dotnet-sdk-aot-9.09.0.122-1.el9_8ALSA-2026:86171
AlmaLinux:10dotnet-sdk-dbg-10.010.0.113-1.el10_2ALSA-2026:86195
AlmaLinux:8dotnet-sdk-dbg-10.010.0.113-1.el8_10ALSA-2026:86192
AlmaLinux:9dotnet-sdk-dbg-10.010.0.113-1.el9_8ALSA-2026:86193
AlmaLinux:10dotnet-sdk-dbg-8.08.0.132-1.el10_2ALSA-2026:86168
AlmaLinux:8dotnet-sdk-dbg-8.08.0.132-2.el8_10ALSA-2026:86594
AlmaLinux:9dotnet-sdk-dbg-8.08.0.132-1.el9_8ALSA-2026:86169
AlmaLinux:10dotnet-sdk-dbg-9.09.0.122-1.el10_2ALSA-2026:86172
AlmaLinux:8dotnet-sdk-dbg-9.09.0.122-1.el8_10ALSA-2026:86170
AlmaLinux:9dotnet-sdk-dbg-9.09.0.122-1.el9_8ALSA-2026:86171
AlmaLinux:10dotnet-targeting-pack-10.010.0.13-1.el10_2ALSA-2026:86195
AlmaLinux:8dotnet-targeting-pack-10.010.0.13-1.el8_10ALSA-2026:86192
AlmaLinux:9dotnet-targeting-pack-10.010.0.13-1.el9_8ALSA-2026:86193
AlmaLinux:10dotnet-targeting-pack-8.08.0.32-1.el10_2ALSA-2026:86168
AlmaLinux:8dotnet-targeting-pack-8.08.0.32-2.el8_10ALSA-2026:86594
AlmaLinux:9dotnet-targeting-pack-8.08.0.32-1.el9_8ALSA-2026:86169
AlmaLinux:10dotnet-targeting-pack-9.09.0.21-1.el10_2ALSA-2026:86172
AlmaLinux:8dotnet-targeting-pack-9.09.0.21-1.el8_10ALSA-2026:86170
AlmaLinux:9dotnet-targeting-pack-9.09.0.21-1.el9_8ALSA-2026:86171
AlmaLinux:10dotnet-templates-10.010.0.113-1.el10_2ALSA-2026:86195
AlmaLinux:8dotnet-templates-10.010.0.113-1.el8_10ALSA-2026:86192
AlmaLinux:9dotnet-templates-10.010.0.113-1.el9_8ALSA-2026:86193
AlmaLinux:10dotnet-templates-8.08.0.132-1.el10_2ALSA-2026:86168
AlmaLinux:8dotnet-templates-8.08.0.132-2.el8_10ALSA-2026:86594
AlmaLinux:9dotnet-templates-8.08.0.132-1.el9_8ALSA-2026:86169
AlmaLinux:10dotnet-templates-9.09.0.122-1.el10_2ALSA-2026:86172
AlmaLinux:8dotnet-templates-9.09.0.122-1.el8_10ALSA-2026:86170
AlmaLinux:9dotnet-templates-9.09.0.122-1.el9_8ALSA-2026:86171
AlmaLinux:10netstandard-targeting-pack-2.19.0.122-1.el10_2ALSA-2026:86172
AlmaLinux:8netstandard-targeting-pack-2.19.0.122-1.el8_10ALSA-2026:86170
AlmaLinux:9netstandard-targeting-pack-2.19.0.122-1.el9_8ALSA-2026:86171
Alpine:v3.23dotnet10-runtime10.0.13-r0ALPINE-CVE-2026-66822
Alpine:v3.24dotnet10-runtime10.0.13-r0ALPINE-CVE-2026-66822
Alpine:v3.22dotnet8-runtime8.0.32-r0ALPINE-CVE-2026-66822
Alpine:v3.23dotnet8-runtime8.0.32-r0ALPINE-CVE-2026-66822
Alpine:v3.24dotnet8-runtime8.0.32-r0ALPINE-CVE-2026-66822
Alpine:v3.22dotnet9-runtime9.0.21-r0ALPINE-CVE-2026-66822
Alpine:v3.23dotnet9-runtime9.0.21-r0ALPINE-CVE-2026-66822
Alpine:v3.24dotnet9-runtime9.0.21-r0ALPINE-CVE-2026-66822
NuGetmicrosoft.netcore.app.runtime.linux-arm10.0.13GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-arm11.0.0-rc.2GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-arm9.0.21GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-arm8.0.32GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-arm648.0.32GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-arm6410.0.13GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-arm6411.0.0-rc.2GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-arm649.0.21GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-musl-arm11.0.0-rc.2GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-musl-arm9.0.21GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-musl-arm10.0.13GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-musl-arm8.0.32GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-musl-arm648.0.32GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-musl-arm6411.0.0-rc.2GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-musl-arm6410.0.13GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-musl-arm649.0.21GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-musl-x6410.0.13GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-musl-x648.0.32GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-musl-x6411.0.0-rc.2GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-musl-x649.0.21GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-x6411.0.0-rc.2GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-x649.0.21GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-x6410.0.13GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.linux-x648.0.32GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.osx-arm648.0.32GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.osx-arm649.0.21GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.osx-arm6410.0.13GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.osx-arm6411.0.0-rc.2GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.osx-x6411.0.0-rc.2GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.osx-x6410.0.13GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.osx-x649.0.21GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.osx-x648.0.32GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.win-arm6411.0.0-rc.2GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.win-arm648.0.32GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.win-arm6410.0.13GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.win-arm649.0.21GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.win-x648.0.32GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.win-x6411.0.0-rc.2GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.win-x649.0.21GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.win-x6410.0.13GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.win-x8610.0.13GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.win-x868.0.32GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.win-x869.0.21GHSA-wxxw-5cvc-53j7
NuGetmicrosoft.netcore.app.runtime.win-x8611.0.0-rc.2GHSA-wxxw-5cvc-53j7
Rocky Linux:10dotnet10.00:10.0.113-1.el10_2RLSA-2026:86195
Rocky Linux:8dotnet10.00:10.0.113-1.el8_10RLSA-2026:86192
Rocky Linux:9dotnet10.00:10.0.113-1.el9_8RLSA-2026:86193
Rocky Linux:10dotnet8.00:8.0.132-1.el10_2RLSA-2026:86168
Rocky Linux:8dotnet8.00:8.0.132-2.el8_10RLSA-2026:86594
Rocky Linux:9dotnet8.00:8.0.132-1.el9_8RLSA-2026:86169
Rocky Linux:10dotnet9.00:9.0.122-1.el10_2RLSA-2026:86172
Rocky Linux:8dotnet9.00:9.0.122-1.el8_10RLSA-2026:86170
Rocky Linux:9dotnet9.00:9.0.122-1.el9_8RLSA-2026:86171
Ubuntu:24.04:LTSdotnet1010.0.113-10.0.13-0ubuntu1~24.04.1USN-8942-1
Ubuntu:24.04:LTSdotnet1010.0.113-10.0.13-0ubuntu1~24.04.1UBUNTU-CVE-2026-66822
Ubuntu:26.04:LTSdotnet1010.0.113-10.0.13-0ubuntu1~26.04.1USN-8942-1
Ubuntu:26.04:LTSdotnet1010.0.113-10.0.13-0ubuntu1~26.04.1UBUNTU-CVE-2026-66822
Ubuntu:26.10dotnet1010.0.113-10.0.13-0ubuntu1~26.10.1USN-8942-1
Ubuntu:26.10dotnet1010.0.113-10.0.13-0ubuntu1~26.10.1UBUNTU-CVE-2026-66822
Ubuntu:26.10dotnet1111.0.100-11.0.0~rc2-0ubuntu1~26.10.1UBUNTU-CVE-2026-66822
Ubuntu:26.10dotnet1111.0.100-11.0.0~rc2-0ubuntu1~26.10.1USN-8942-1
Ubuntu:22.04:LTSdotnet6no fix listedUBUNTU-CVE-2026-66822
Ubuntu:22.04:LTSdotnet7no fix listedUBUNTU-CVE-2026-66822
Ubuntu:22.04:LTSdotnet88.0.132-8.0.32-0ubuntu1~22.04.1UBUNTU-CVE-2026-66822
Ubuntu:22.04:LTSdotnet88.0.132-8.0.32-0ubuntu1~22.04.1USN-8942-1
Ubuntu:24.04:LTSdotnet88.0.132-8.0.32-0ubuntu1~24.04.1USN-8942-1
Ubuntu:24.04:LTSdotnet88.0.132-8.0.32-0ubuntu1~24.04.1UBUNTU-CVE-2026-66822

Affected products (as reported)

VendorProductVersions
Microsoft .NET 10.0 runtime 10.0.0 – before 10.0.13
Microsoft .NET 11.0 runtime 11.0.0 – before 11.0.0-rc.2
Microsoft .NET 8.0 runtime 8.0.0 – before 8.0.32
Microsoft .NET 9.0 runtime 9.0.0 – before 9.0.21
Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.0 – before 17.14.42
Microsoft Microsoft Visual Studio 2026 version 18.10 18.10.0 – before 18.10.4

Weakness: CWE-201 · 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

References