diff --git a/.github/workflows/microsoft-build-rntester.yml b/.github/workflows/microsoft-build-rntester.yml
index 20797e8f8d07..c24f754f5e1d 100644
--- a/.github/workflows/microsoft-build-rntester.yml
+++ b/.github/workflows/microsoft-build-rntester.yml
@@ -5,7 +5,7 @@ on:
 
 jobs:
   build-rntester:
-    name: "${{ matrix.platform }}, ${{ matrix.arch }}"
+    name: "${{ matrix.platform }}, ${{ matrix.arch }}, ${{ matrix.linkage }}"
     runs-on: macos-26
     timeout-minutes: 90
     strategy:
@@ -13,6 +13,7 @@ jobs:
       matrix:
         platform: [macos, ios, visionos]
         arch: [oldarch, newarch]
+        linkage: [static, dynamic]
         include:
           # Platform-specific properties
           - platform: macos
@@ -32,6 +33,11 @@ jobs:
             new_arch_enabled: '0'
           - arch: newarch
             new_arch_enabled: '1'
+          # Linkage-specific properties
+          - linkage: static
+            use_frameworks: ''
+          - linkage: dynamic
+            use_frameworks: 'dynamic'
 
     steps:
       - uses: actions/checkout@v4
@@ -53,8 +59,15 @@ jobs:
         working-directory: packages/rn-tester
         env:
           RCT_NEW_ARCH_ENABLED: ${{ matrix.new_arch_enabled }}
+          USE_FRAMEWORKS: ${{ matrix.use_frameworks }}
         run: |
           set -eox pipefail
+          # USE_FRAMEWORKS is empty for static-library builds; unset it so the
+          # Podfile keeps its default (static libraries) instead of coercing an
+          # empty linkage value.
+          if [[ -z "$USE_FRAMEWORKS" ]]; then
+            unset USE_FRAMEWORKS
+          fi
           bundle install
           bundle exec pod install --verbose
 
diff --git a/packages/react-native/third-party-podspecs/RCT-Folly.podspec b/packages/react-native/third-party-podspecs/RCT-Folly.podspec
index 8852179b6ce2..0b9388d6a7aa 100644
--- a/packages/react-native/third-party-podspecs/RCT-Folly.podspec
+++ b/packages/react-native/third-party-podspecs/RCT-Folly.podspec
@@ -49,6 +49,7 @@ Pod::Spec.new do |spec|
                       'folly/lang/CString.cpp',
                       'folly/lang/Exception.cpp',
                       'folly/memory/ReentrantAllocator.cpp',
+                      'folly/memory/SanitizeLeak.cpp',
                       'folly/memory/detail/MallocImpl.cpp',
                       'folly/net/NetOps.cpp',
                       'folly/portability/SysUio.cpp',