[release/10.0] Prevent format injection in hosting Windows PAL printf functions when redirected to file #119728
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… redirected to file Fixes #119566
jkotas
approved these changes
Sep 15, 2025
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Tagging subscribers to this area: @vitek-karas, @agocke, @VSadov |
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Backport of #119568 to release/10.0
/cc @jkoritzinsky @nike4613
Customer Impact
Prevents environment variables with formating markup from being passed through to redirected output formatting.
Regression
This passthrough from environment variable is only possible in .NET 10.
Testing
Manual validation.
Risk
Low. Isolated fix.
IMPORTANT: If this backport is for a servicing release, please verify that:
release/X.0-staging, notrelease/X.0.Package authoring no longer needed in .NET 9
IMPORTANT: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version.
Keep in mind that we still need package authoring in .NET 8 and older versions.