Update .NET Framework images for May 2026 releases (#1307)

lbussell · web-flow · commit 84dcd33cae41 · 2026-05-12T11:00:51.000-07:00
diff --git a/README.aspnet.md b/README.aspnet.md
@@ -66,10 +66,10 @@ Additionally, .NET Framework 4.8 and 4.8.1 can run apps that were built targetin
 
 Tags | Dockerfile | OS Version
 ---- | ---------- | ----------
-4.8.1-20260414-windowsservercore-ltsc2025, 4.8.1-windowsservercore-ltsc2025, 4.8.1 | [Dockerfile](src/aspnet/4.8.1/windowsservercore-ltsc2025/Dockerfile) | Windows Server Core 2025
-4.8.1-20260414-windowsservercore-ltsc2022, 4.8.1-windowsservercore-ltsc2022, 4.8.1 | [Dockerfile](src/aspnet/4.8.1/windowsservercore-ltsc2022/Dockerfile) | Windows Server Core 2022
-4.8-20260414-windowsservercore-ltsc2019, 4.8-windowsservercore-ltsc2019, 4.8, latest | [Dockerfile](src/aspnet/4.8/windowsservercore-ltsc2019/Dockerfile) | Windows Server Core 2019
-4.8-20260414-windowsservercore-ltsc2016, 4.8-windowsservercore-ltsc2016, 4.8, latest | [Dockerfile](src/aspnet/4.8/windowsservercore-ltsc2016/Dockerfile) | Windows Server Core 2016
+4.8.1-20260512-windowsservercore-ltsc2025, 4.8.1-windowsservercore-ltsc2025, 4.8.1 | [Dockerfile](src/aspnet/4.8.1/windowsservercore-ltsc2025/Dockerfile) | Windows Server Core 2025
+4.8.1-20260512-windowsservercore-ltsc2022, 4.8.1-windowsservercore-ltsc2022, 4.8.1 | [Dockerfile](src/aspnet/4.8.1/windowsservercore-ltsc2022/Dockerfile) | Windows Server Core 2022
+4.8-20260512-windowsservercore-ltsc2019, 4.8-windowsservercore-ltsc2019, 4.8, latest | [Dockerfile](src/aspnet/4.8/windowsservercore-ltsc2019/Dockerfile) | Windows Server Core 2019
+4.8-20260512-windowsservercore-ltsc2016, 4.8-windowsservercore-ltsc2016, 4.8, latest | [Dockerfile](src/aspnet/4.8/windowsservercore-ltsc2016/Dockerfile) | Windows Server Core 2016
 
 <!--End of generated tags-->
 
diff --git a/README.runtime.md b/README.runtime.md
@@ -57,10 +57,10 @@ Additionally, .NET Framework 4.8 and 4.8.1 can run apps that were built targetin
 
 Tags | Dockerfile | OS Version
 ---- | ---------- | ----------
-4.8.1-20260414-windowsservercore-ltsc2025, 4.8.1-windowsservercore-ltsc2025, 4.8.1 | [Dockerfile](src/runtime/4.8.1/windowsservercore-ltsc2025/Dockerfile) | Windows Server Core 2025
-4.8.1-20260414-windowsservercore-ltsc2022, 4.8.1-windowsservercore-ltsc2022, 4.8.1 | [Dockerfile](src/runtime/4.8.1/windowsservercore-ltsc2022/Dockerfile) | Windows Server Core 2022
-4.8-20260414-windowsservercore-ltsc2019, 4.8-windowsservercore-ltsc2019, 4.8, latest | [Dockerfile](src/runtime/4.8/windowsservercore-ltsc2019/Dockerfile) | Windows Server Core 2019
-4.8-20260414-windowsservercore-ltsc2016, 4.8-windowsservercore-ltsc2016, 4.8, latest | [Dockerfile](src/runtime/4.8/windowsservercore-ltsc2016/Dockerfile) | Windows Server Core 2016
+4.8.1-20260512-windowsservercore-ltsc2025, 4.8.1-windowsservercore-ltsc2025, 4.8.1 | [Dockerfile](src/runtime/4.8.1/windowsservercore-ltsc2025/Dockerfile) | Windows Server Core 2025
+4.8.1-20260512-windowsservercore-ltsc2022, 4.8.1-windowsservercore-ltsc2022, 4.8.1 | [Dockerfile](src/runtime/4.8.1/windowsservercore-ltsc2022/Dockerfile) | Windows Server Core 2022
+4.8-20260512-windowsservercore-ltsc2019, 4.8-windowsservercore-ltsc2019, 4.8, latest | [Dockerfile](src/runtime/4.8/windowsservercore-ltsc2019/Dockerfile) | Windows Server Core 2019
+4.8-20260512-windowsservercore-ltsc2016, 4.8-windowsservercore-ltsc2016, 4.8, latest | [Dockerfile](src/runtime/4.8/windowsservercore-ltsc2016/Dockerfile) | Windows Server Core 2016
 
 <!--End of generated tags-->
 
diff --git a/README.sdk.md b/README.sdk.md
@@ -62,10 +62,10 @@ Additionally, .NET Framework 4.8 and 4.8.1 can run apps that were built targetin
 
 Tags | Dockerfile | OS Version
 ---- | ---------- | ----------
-4.8.1-20260414-windowsservercore-ltsc2025, 4.8.1-windowsservercore-ltsc2025, 4.8.1 | [Dockerfile](src/sdk/4.8.1/windowsservercore-ltsc2025/Dockerfile) | Windows Server Core 2025
-4.8.1-20260414-windowsservercore-ltsc2022, 4.8.1-windowsservercore-ltsc2022, 4.8.1 | [Dockerfile](src/sdk/4.8.1/windowsservercore-ltsc2022/Dockerfile) | Windows Server Core 2022
-4.8-20260414-windowsservercore-ltsc2019, 4.8-windowsservercore-ltsc2019, 4.8, latest | [Dockerfile](src/sdk/4.8/windowsservercore-ltsc2019/Dockerfile) | Windows Server Core 2019
-4.8-20260414-windowsservercore-ltsc2016, 4.8-windowsservercore-ltsc2016, 4.8, latest | [Dockerfile](src/sdk/4.8/windowsservercore-ltsc2016/Dockerfile) | Windows Server Core 2016
+4.8.1-20260512-windowsservercore-ltsc2025, 4.8.1-windowsservercore-ltsc2025, 4.8.1 | [Dockerfile](src/sdk/4.8.1/windowsservercore-ltsc2025/Dockerfile) | Windows Server Core 2025
+4.8.1-20260512-windowsservercore-ltsc2022, 4.8.1-windowsservercore-ltsc2022, 4.8.1 | [Dockerfile](src/sdk/4.8.1/windowsservercore-ltsc2022/Dockerfile) | Windows Server Core 2022
+4.8-20260512-windowsservercore-ltsc2019, 4.8-windowsservercore-ltsc2019, 4.8, latest | [Dockerfile](src/sdk/4.8/windowsservercore-ltsc2019/Dockerfile) | Windows Server Core 2019
+4.8-20260512-windowsservercore-ltsc2016, 4.8-windowsservercore-ltsc2016, 4.8, latest | [Dockerfile](src/sdk/4.8/windowsservercore-ltsc2016/Dockerfile) | Windows Server Core 2016
 
 <!--End of generated tags-->
 
diff --git a/README.wcf.md b/README.wcf.md
@@ -70,10 +70,10 @@ Additionally, .NET Framework 4.8 and 4.8.1 can run apps that were built targetin
 
 Tags | Dockerfile | OS Version
 ---- | ---------- | ----------
-4.8.1-20260414-windowsservercore-ltsc2025, 4.8.1-windowsservercore-ltsc2025, 4.8.1 | [Dockerfile](src/wcf/4.8.1/windowsservercore-ltsc2025/Dockerfile) | Windows Server Core 2025
-4.8.1-20260414-windowsservercore-ltsc2022, 4.8.1-windowsservercore-ltsc2022, 4.8.1 | [Dockerfile](src/wcf/4.8.1/windowsservercore-ltsc2022/Dockerfile) | Windows Server Core 2022
-4.8-20260414-windowsservercore-ltsc2019, 4.8-windowsservercore-ltsc2019, 4.8, latest | [Dockerfile](src/wcf/4.8/windowsservercore-ltsc2019/Dockerfile) | Windows Server Core 2019
-4.8-20260414-windowsservercore-ltsc2016, 4.8-windowsservercore-ltsc2016, 4.8, latest | [Dockerfile](src/wcf/4.8/windowsservercore-ltsc2016/Dockerfile) | Windows Server Core 2016
+4.8.1-20260512-windowsservercore-ltsc2025, 4.8.1-windowsservercore-ltsc2025, 4.8.1 | [Dockerfile](src/wcf/4.8.1/windowsservercore-ltsc2025/Dockerfile) | Windows Server Core 2025
+4.8.1-20260512-windowsservercore-ltsc2022, 4.8.1-windowsservercore-ltsc2022, 4.8.1 | [Dockerfile](src/wcf/4.8.1/windowsservercore-ltsc2022/Dockerfile) | Windows Server Core 2022
+4.8-20260512-windowsservercore-ltsc2019, 4.8-windowsservercore-ltsc2019, 4.8, latest | [Dockerfile](src/wcf/4.8/windowsservercore-ltsc2019/Dockerfile) | Windows Server Core 2019
+4.8-20260512-windowsservercore-ltsc2016, 4.8-windowsservercore-ltsc2016, 4.8, latest | [Dockerfile](src/wcf/4.8/windowsservercore-ltsc2016/Dockerfile) | Windows Server Core 2016
 
 <!--End of generated tags-->
 
diff --git a/manifest.datestamps.json b/manifest.datestamps.json
@@ -1,6 +1,6 @@
 {
   "variables": {
-    "CurrentReleaseDateStamp": "20260414",
+    "CurrentReleaseDateStamp": "20260512",
     "RuntimeReleaseDateStamp": "$(CurrentReleaseDateStamp)",
     "AspnetReleaseDateStamp": "$(CurrentReleaseDateStamp)",
     "WcfReleaseDateStamp": "$(CurrentReleaseDateStamp)",
diff --git a/manifest.versions.json b/manifest.versions.json
@@ -1,15 +1,15 @@
 {
   "variables": {
     "4.8-is-security-release": true,
-    "kb|ltsc2016|4.8": "KB5082411",
-    "lcu|ltsc2016|4.8": "https://catalog.s.download.windowsupdate.com/d/msdownload/update/software/secu/2026/03/windows10.0-kb5082411-x64-ndp48_21d9288b9b7c21c1557609b58e6926bcb3ca05b2.msu",
-    "kb|ltsc2019|4.8": "KB5082414",
-    "lcu|ltsc2019|4.8": "https://catalog.s.download.windowsupdate.com/d/msdownload/update/software/secu/2026/03/windows10.0-kb5082414-x64-ndp48_6edea76ef38203f73b3af222041187375a209d65.msu",
-    "kb|ltsc2022|4.8.1": "KB5082425",
-    "lcu|ltsc2022|4.8.1": "https://catalog.s.download.windowsupdate.com/d/msdownload/update/software/secu/2026/03/windows10.0-kb5082425-x64-ndp481_435f53976e85e367d28583d5e767ad3263e52bf0.msu",
-    "kb|ltsc2025|4.8.1": "KB5082420",
-    "lcu|ltsc2025|4.8.1": "https://catalog.sf.dl.delivery.mp.microsoft.com/filestreamingservice/files/9e7e9e65-f8e1-4c58-895a-03a4e4b27b16/public/windows11.0-kb5082420-x64-ndp481_e669d8241160acba1ade1a111a50a5702f15706e.msu",
-    "nuget|version": "7.3.0",
+    "kb|ltsc2016|4.8": "KB5087065",
+    "lcu|ltsc2016|4.8": "https://catalog.s.download.windowsupdate.com/c/msdownload/update/software/secu/2026/05/windows10.0-kb5087065-x64-ndp48_631ce425f7c69cbd26a9345ad20b2deab4c5b049.msu",
+    "kb|ltsc2019|4.8": "KB5087066",
+    "lcu|ltsc2019|4.8": "https://catalog.s.download.windowsupdate.com/d/msdownload/update/software/secu/2026/04/windows10.0-kb5087066-x64-ndp48_086eed6e068d65a3e098311b5c742d745048d5fd.msu",
+    "kb|ltsc2022|4.8.1": "KB5087059",
+    "lcu|ltsc2022|4.8.1": "https://catalog.s.download.windowsupdate.com/c/msdownload/update/software/secu/2026/04/windows10.0-kb5087059-x64-ndp481_429d8898a3beb6753b62ab9570ab5a06c1ada069.msu",
+    "kb|ltsc2025|4.8.1": "KB5087054",
+    "lcu|ltsc2025|4.8.1": "https://catalog.sf.dl.delivery.mp.microsoft.com/filestreamingservice/files/cc8ce9c1-fa92-4562-92ca-1fab4911143a/public/windows11.0-kb5087054-x64-ndp481_9f992b2552fd55390be19470a8fcfa2047952a43.msu",
+    "nuget|version": "7.3.1",
     "referenceassemblies|version": "1.0.3",
     "servicemonitor|version": "2.0.1.10",
     "servicemonitor|url": "https://github.com/microsoft/IIS.ServiceMonitor/releases/download/v$(servicemonitor|version)/ServiceMonitor.exe",
diff --git a/src/aspnet/4.8.1/windowsservercore-ltsc2022/Dockerfile b/src/aspnet/4.8.1/windowsservercore-ltsc2022/Dockerfile
@@ -1,7 +1,7 @@
 # escape=`
 
 ARG REPO=mcr.microsoft.com/dotnet/framework/runtime
-FROM $REPO:4.8.1-20260414-windowsservercore-ltsc2022
+FROM $REPO:4.8.1-20260512-windowsservercore-ltsc2022
 
 RUN dism /Online /Quiet /Enable-Feature /All /FeatureName:IIS-WebServerRole /FeatureName:NetFx4Extended-ASPNET45 /FeatureName:IIS-ASPNET45 `
     && dism /Online /Quiet /Disable-Feature /FeatureName:IIS-WebServerManagementTools `
diff --git a/src/aspnet/4.8.1/windowsservercore-ltsc2025/Dockerfile b/src/aspnet/4.8.1/windowsservercore-ltsc2025/Dockerfile
@@ -1,7 +1,7 @@
 # escape=`
 
 ARG REPO=mcr.microsoft.com/dotnet/framework/runtime
-FROM $REPO:4.8.1-20260414-windowsservercore-ltsc2025
+FROM $REPO:4.8.1-20260512-windowsservercore-ltsc2025
 
 RUN dism /Online /Quiet /Enable-Feature /All /FeatureName:IIS-WebServerRole /FeatureName:NetFx4Extended-ASPNET45 /FeatureName:IIS-ASPNET45 `
     && dism /Online /Quiet /Disable-Feature /FeatureName:IIS-WebServerManagementTools `
diff --git a/src/aspnet/4.8/windowsservercore-ltsc2016/Dockerfile b/src/aspnet/4.8/windowsservercore-ltsc2016/Dockerfile
@@ -1,7 +1,7 @@
 # escape=`
 
 ARG REPO=mcr.microsoft.com/dotnet/framework/runtime
-FROM $REPO:4.8-20260414-windowsservercore-ltsc2016
+FROM $REPO:4.8-20260512-windowsservercore-ltsc2016
 
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
 
diff --git a/src/aspnet/4.8/windowsservercore-ltsc2019/Dockerfile b/src/aspnet/4.8/windowsservercore-ltsc2019/Dockerfile
@@ -1,7 +1,7 @@
 # escape=`
 
 ARG REPO=mcr.microsoft.com/dotnet/framework/runtime
-FROM $REPO:4.8-20260414-windowsservercore-ltsc2019
+FROM $REPO:4.8-20260512-windowsservercore-ltsc2019
 
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
 
diff --git a/src/runtime/4.8.1/windowsservercore-ltsc2022/Dockerfile b/src/runtime/4.8.1/windowsservercore-ltsc2022/Dockerfile
@@ -16,11 +16,11 @@ RUN `
     && powershell Remove-Item -Force -Recurse ${Env:TEMP}\* `
     `
     # Apply latest patch
-    && curl -fSLo patch.msu https://catalog.s.download.windowsupdate.com/d/msdownload/update/software/secu/2026/03/windows10.0-kb5082425-x64-ndp481_435f53976e85e367d28583d5e767ad3263e52bf0.msu `
+    && curl -fSLo patch.msu https://catalog.s.download.windowsupdate.com/c/msdownload/update/software/secu/2026/04/windows10.0-kb5087059-x64-ndp481_429d8898a3beb6753b62ab9570ab5a06c1ada069.msu `
     && mkdir patch `
     && expand patch.msu patch -F:* `
     && del /F /Q patch.msu `
-    && dism /Online /Quiet /Add-Package /PackagePath:C:\patch\windows10.0-KB5082425-x64-ndp481.cab `
+    && dism /Online /Quiet /Add-Package /PackagePath:C:\patch\windows10.0-KB5087059-x64-ndp481.cab `
     && rmdir /S /Q patch `
     `
     # Ngen top of assembly graph to optimize a set of frequently used assemblies
diff --git a/src/runtime/4.8.1/windowsservercore-ltsc2025/Dockerfile b/src/runtime/4.8.1/windowsservercore-ltsc2025/Dockerfile
@@ -10,11 +10,11 @@ ENV `
 
 RUN `
     # Apply latest patch
-    curl -fSLo patch.msu https://catalog.sf.dl.delivery.mp.microsoft.com/filestreamingservice/files/9e7e9e65-f8e1-4c58-895a-03a4e4b27b16/public/windows11.0-kb5082420-x64-ndp481_e669d8241160acba1ade1a111a50a5702f15706e.msu `
+    curl -fSLo patch.msu https://catalog.sf.dl.delivery.mp.microsoft.com/filestreamingservice/files/cc8ce9c1-fa92-4562-92ca-1fab4911143a/public/windows11.0-kb5087054-x64-ndp481_9f992b2552fd55390be19470a8fcfa2047952a43.msu `
     && mkdir patch `
     && expand patch.msu patch -F:* `
     && del /F /Q patch.msu `
-    && dism /Online /Quiet /Add-Package /PackagePath:C:\patch\windows11.0-KB5082420-x64-ndp481.cab `
+    && dism /Online /Quiet /Add-Package /PackagePath:C:\patch\windows11.0-KB5087054-x64-ndp481.cab `
     && rmdir /S /Q patch `
     `
     # Ngen top of assembly graph to optimize a set of frequently used assemblies
diff --git a/src/runtime/4.8/windowsservercore-ltsc2016/Dockerfile b/src/runtime/4.8/windowsservercore-ltsc2016/Dockerfile
@@ -23,12 +23,12 @@ RUN `
         [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; `
         Invoke-WebRequest `
             -UseBasicParsing `
-            -Uri https://catalog.s.download.windowsupdate.com/d/msdownload/update/software/secu/2026/03/windows10.0-kb5082411-x64-ndp48_21d9288b9b7c21c1557609b58e6926bcb3ca05b2.msu `
+            -Uri https://catalog.s.download.windowsupdate.com/c/msdownload/update/software/secu/2026/05/windows10.0-kb5087065-x64-ndp48_631ce425f7c69cbd26a9345ad20b2deab4c5b049.msu `
             -OutFile patch.msu; `
     && mkdir patch `
     && expand patch.msu patch -F:* `
     && del patch.msu `
-    && dism /Online /Quiet /Add-Package /PackagePath:C:\patch\windows10.0-KB5082411-x64-ndp48.cab `
+    && dism /Online /Quiet /Add-Package /PackagePath:C:\patch\windows10.0-KB5087065-x64-ndp48.cab `
     && rmdir /S /Q patch `
     `
     # ngen .NET Fx
diff --git a/src/runtime/4.8/windowsservercore-ltsc2019/Dockerfile b/src/runtime/4.8/windowsservercore-ltsc2019/Dockerfile
@@ -15,11 +15,11 @@ RUN `
     && powershell Remove-Item -Force -Recurse ${Env:TEMP}\* `
     `
     # Apply latest patch
-    && curl -fSLo patch.msu https://catalog.s.download.windowsupdate.com/d/msdownload/update/software/secu/2026/03/windows10.0-kb5082414-x64-ndp48_6edea76ef38203f73b3af222041187375a209d65.msu `
+    && curl -fSLo patch.msu https://catalog.s.download.windowsupdate.com/d/msdownload/update/software/secu/2026/04/windows10.0-kb5087066-x64-ndp48_086eed6e068d65a3e098311b5c742d745048d5fd.msu `
     && mkdir patch `
     && expand patch.msu patch -F:* `
     && del /F /Q patch.msu `
-    && dism /Online /Quiet /Add-Package /PackagePath:C:\patch\windows10.0-KB5082414-x64-ndp48.cab `
+    && dism /Online /Quiet /Add-Package /PackagePath:C:\patch\windows10.0-KB5087066-x64-ndp48.cab `
     && rmdir /S /Q patch `
     `
     # ngen .NET Fx
diff --git a/src/sdk/4.8.1/windowsservercore-ltsc2022/Dockerfile b/src/sdk/4.8.1/windowsservercore-ltsc2022/Dockerfile
@@ -1,15 +1,15 @@
 # escape=`
 
 ARG REPO=mcr.microsoft.com/dotnet/framework/runtime
-FROM $REPO:4.8.1-20260414-windowsservercore-ltsc2022
+FROM $REPO:4.8.1-20260512-windowsservercore-ltsc2022
 
 ENV `
     # Do not generate certificate
     DOTNET_GENERATE_ASPNET_CERTIFICATE=false `
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true `
     # NuGet version to install
-    NUGET_VERSION=7.3.0 `
+    NUGET_VERSION=7.3.1 `
     # Install location of Roslyn
     ROSLYN_COMPILER_LOCATION="C:\Program Files (x86)\Microsoft Visual Studio\18\BuildTools\MSBuild\Current\Bin\Roslyn"
 
diff --git a/src/sdk/4.8.1/windowsservercore-ltsc2025/Dockerfile b/src/sdk/4.8.1/windowsservercore-ltsc2025/Dockerfile
@@ -1,15 +1,15 @@
 # escape=`
 
 ARG REPO=mcr.microsoft.com/dotnet/framework/runtime
-FROM $REPO:4.8.1-20260414-windowsservercore-ltsc2025
+FROM $REPO:4.8.1-20260512-windowsservercore-ltsc2025
 
 ENV `
     # Do not generate certificate
     DOTNET_GENERATE_ASPNET_CERTIFICATE=false `
     # Enable correct mode for dotnet watch (only mode supported in a container)
     DOTNET_USE_POLLING_FILE_WATCHER=true `
     # NuGet version to install
-    NUGET_VERSION=7.3.0 `
+    NUGET_VERSION=7.3.1 `
     # Install location of Roslyn
     ROSLYN_COMPILER_LOCATION="C:\Program Files (x86)\Microsoft Visual Studio\18\BuildTools\MSBuild\Current\Bin\Roslyn"
 
diff --git a/src/sdk/4.8/windowsservercore-ltsc2016/Dockerfile b/src/sdk/4.8/windowsservercore-ltsc2016/Dockerfile
@@ -1,10 +1,10 @@
 # escape=`
 
 ARG REPO=mcr.microsoft.com/dotnet/framework/runtime
-FROM $REPO:4.8-20260414-windowsservercore-ltsc2016
+FROM $REPO:4.8-20260512-windowsservercore-ltsc2016
 
 # Install NuGet CLI
-ENV NUGET_VERSION=7.3.0
+ENV NUGET_VERSION=7.3.1
 RUN mkdir "%ProgramFiles%\NuGet\latest" `
     && powershell -Command `
         $ProgressPreference = 'SilentlyContinue'; `
diff --git a/src/sdk/4.8/windowsservercore-ltsc2019/Dockerfile b/src/sdk/4.8/windowsservercore-ltsc2019/Dockerfile
@@ -1,13 +1,13 @@
 # escape=`
 
 ARG REPO=mcr.microsoft.com/dotnet/framework/runtime
-FROM $REPO:4.8-20260414-windowsservercore-ltsc2019
+FROM $REPO:4.8-20260512-windowsservercore-ltsc2019
 
 ENV `
     # Do not generate certificate
     DOTNET_GENERATE_ASPNET_CERTIFICATE=false `
     # NuGet version to install
-    NUGET_VERSION=7.3.0 `
+    NUGET_VERSION=7.3.1 `
     # Install location of Roslyn
     ROSLYN_COMPILER_LOCATION="C:\Program Files (x86)\Microsoft Visual Studio\18\BuildTools\MSBuild\Current\Bin\Roslyn"
 
diff --git a/src/wcf/4.8.1/windowsservercore-ltsc2022/Dockerfile b/src/wcf/4.8.1/windowsservercore-ltsc2022/Dockerfile
@@ -1,7 +1,7 @@
 # escape=`
 
 ARG REPO=mcr.microsoft.com/dotnet/framework/aspnet
-FROM $REPO:4.8.1-20260414-windowsservercore-ltsc2022
+FROM $REPO:4.8.1-20260512-windowsservercore-ltsc2022
 
 # Install Windows components required for WCF service hosted on IIS
 RUN dism /Online /Quiet /Enable-Feature /All /FeatureName:WCF-HTTP-Activation45 /FeatureName:WCF-TCP-Activation45 /FeatureName:IIS-WebSockets
diff --git a/src/wcf/4.8.1/windowsservercore-ltsc2025/Dockerfile b/src/wcf/4.8.1/windowsservercore-ltsc2025/Dockerfile
@@ -1,7 +1,7 @@
 # escape=`
 
 ARG REPO=mcr.microsoft.com/dotnet/framework/aspnet
-FROM $REPO:4.8.1-20260414-windowsservercore-ltsc2025
+FROM $REPO:4.8.1-20260512-windowsservercore-ltsc2025
 
 # Install Windows components required for WCF service hosted on IIS
 RUN dism /Online /Quiet /Enable-Feature /All /FeatureName:WCF-HTTP-Activation45 /FeatureName:WCF-TCP-Activation45 /FeatureName:IIS-WebSockets
diff --git a/src/wcf/4.8/windowsservercore-ltsc2016/Dockerfile b/src/wcf/4.8/windowsservercore-ltsc2016/Dockerfile
@@ -1,7 +1,7 @@
 # escape=`
 
 ARG REPO=mcr.microsoft.com/dotnet/framework/aspnet
-FROM $REPO:4.8-20260414-windowsservercore-ltsc2016
+FROM $REPO:4.8-20260512-windowsservercore-ltsc2016
 
 # Install Windows components required for WCF service hosted on IIS
 RUN Add-WindowsFeature NET-WCF-TCP-Activation45; `
diff --git a/src/wcf/4.8/windowsservercore-ltsc2019/Dockerfile b/src/wcf/4.8/windowsservercore-ltsc2019/Dockerfile
@@ -1,7 +1,7 @@
 # escape=`
 
 ARG REPO=mcr.microsoft.com/dotnet/framework/aspnet
-FROM $REPO:4.8-20260414-windowsservercore-ltsc2019
+FROM $REPO:4.8-20260512-windowsservercore-ltsc2019
 
 # Install Windows components required for WCF service hosted on IIS
 RUN Add-WindowsFeature NET-WCF-TCP-Activation45; `

Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"variables": {`
`3`		`- "CurrentReleaseDateStamp": "20260414",`
	`3`	`+ "CurrentReleaseDateStamp": "20260512",`
`4`	`4`	`"RuntimeReleaseDateStamp": "$(CurrentReleaseDateStamp)",`
`5`	`5`	`"AspnetReleaseDateStamp": "$(CurrentReleaseDateStamp)",`
`6`	`6`	`"WcfReleaseDateStamp": "$(CurrentReleaseDateStamp)",`