diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2f1fb6f1..0b3497f8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,16 +16,16 @@ jobs:
       ANDROID_API_LEVEL: "31"
       BUILD_TOOLS_VERSION: "31.0.0"
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - name: Install Java
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
         with:
           distribution: 'temurin'
           java-version: '11'
 
       - name: Install .NET
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@9a946fdbd5fb07b82b2f5a4466058b876ab72bb2 # v5.3.0
         with:
           dotnet-version: ${{ env.DOTNET_VERSION }}
 
@@ -56,13 +56,13 @@ jobs:
         run: dotnet --info
 
       - name: Setup NuGet
-        uses: nuget/setup-nuget@v2
+        uses: nuget/setup-nuget@d105a947828025cd7a980103c35ba2bfae586d0f # v2.0.2
 
       - name: Restore NuGet
         run: nuget restore Auth0.OidcClient.All.sln
       
       - name: Setup MSBuild
-        uses: microsoft/setup-msbuild@v2
+        uses: microsoft/setup-msbuild@6fb02220983dee41ce7ae257b6f4d8f9bf5ed4ce # v2.0.0
 
       - name: Build
         run: msbuild Auth0.OidcClient.All.sln -t:rebuild -property:Configuration=Release -property:AndroidSdkDirectory=%ANDROID_SDK_ROOT%
diff --git a/.github/workflows/nuget-release.yml b/.github/workflows/nuget-release.yml
index 2946fe0b..e3093160 100644
--- a/.github/workflows/nuget-release.yml
+++ b/.github/workflows/nuget-release.yml
@@ -29,11 +29,11 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v6
+      uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       with:
         fetch-depth: 0
 
-    - uses: actions/download-artifact@v7
+    - uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131 # v7.0.0
       with:
         path: './src'
         name: build
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index c5257947..a2b7f62b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -22,18 +22,18 @@ jobs:
     if: github.event_name == 'workflow_dispatch' || (github.event_name == 'pull_request' && github.event.pull_request.merged && startsWith(github.event.pull_request.head.ref, 'release/'))
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 0
 
       - name: Install Java
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
         with:
           distribution: 'temurin'
           java-version: '11'
 
       - name: Install .NET
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@9a946fdbd5fb07b82b2f5a4466058b876ab72bb2 # v5.3.0
         with:
           dotnet-version: '9.0.200'
 
@@ -41,18 +41,18 @@ jobs:
         run: dotnet workload install android ios maui
 
       - name: Setup NuGet
-        uses: nuget/setup-nuget@v2
+        uses: nuget/setup-nuget@d105a947828025cd7a980103c35ba2bfae586d0f # v2.0.2
 
       - name: Restore NuGet
         run: nuget restore Auth0.OidcClient.All.sln
 
       - name: Setup MSBuild
-        uses: microsoft/setup-msbuild@v2
+        uses: microsoft/setup-msbuild@6fb02220983dee41ce7ae257b6f4d8f9bf5ed4ce # v2.0.0
 
       - name: Build
         run: msbuild Auth0.OidcClient.All.sln -t:rebuild -verbosity:diag -property:Configuration=Release
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: build
           path: './src'
@@ -300,11 +300,11 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 0
 
-      - uses: actions/download-artifact@v7
+      - uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131 # v7.0.0
         with:
           path: './src'
           name: build
@@ -316,7 +316,7 @@ jobs:
         run: ./tools/build-docs.sh
         shell: bash
 
-      - uses: actions/upload-pages-artifact@v4
+      - uses: actions/upload-pages-artifact@7b1f4a764d45c48632c6b24a0339c27f5614fb0b # v4.0.0
         with:
           path: docs
 
@@ -337,4 +337,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4 # or specific "vX.X.X" version tag for this action
\ No newline at end of file
+        uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e # v4.0.5 # or specific "vX.X.X" version tag for this action
\ No newline at end of file
diff --git a/.github/workflows/rl-secure.yml b/.github/workflows/rl-secure.yml
index 50820e4c..884b6c2a 100644
--- a/.github/workflows/rl-secure.yml
+++ b/.github/workflows/rl-secure.yml
@@ -41,12 +41,12 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 0
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@9a946fdbd5fb07b82b2f5a4466058b876ab72bb2 # v5.3.0
         with:
           dotnet-version: '9.0.200'
 
@@ -56,9 +56,9 @@ jobs:
           sudo apt-get install -y mono-complete
 
       - name: Setup NuGet
-        uses: nuget/setup-nuget@v2
+        uses: nuget/setup-nuget@d105a947828025cd7a980103c35ba2bfae586d0f # v2.0.2
 
-      - uses: actions/download-artifact@v7
+      - uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131 # v7.0.0
         with:
           path: './src'
           name: build
@@ -85,7 +85,7 @@ jobs:
 
       - name: Run RL Scanner
         id: rl-scan-conclusion
-        uses: auth0/devsecops-tooling/.github/actions/rl-scan@main
+        uses: auth0/devsecops-tooling/.github/actions/rl-scan@e29f26478db18ff0bcbe4bc447a8fbd54fbeec9e # main on 2026-06-09, TODO: use a release instead
         with:
           artifact-name: ${{ inputs.artifact-name }}
           artifact-path: ${{ github.workspace }}/${{ inputs.artifact-name }}
diff --git a/.github/workflows/snyk.yml b/.github/workflows/snyk.yml
index bdd124c4..7749ce43 100644
--- a/.github/workflows/snyk.yml
+++ b/.github/workflows/snyk.yml
@@ -30,18 +30,18 @@ jobs:
       - if: github.actor == 'dependabot[bot]' || github.event_name == 'merge_group'
         run: exit 0 # Skip unnecessary test runs for dependabot and merge queues. Artifically flag as successful, as this is a required check for branch protection.
 
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           ref: ${{ github.event.pull_request.merge_commit_sha || github.ref }}
 
       - name: Install Java
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
         with:
           distribution: 'temurin'
           java-version: '11'
 
       - name: Install .NET
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@9a946fdbd5fb07b82b2f5a4466058b876ab72bb2 # v5.3.0
         with:
           dotnet-version: '9.0.200'
 
@@ -52,7 +52,7 @@ jobs:
         run: dotnet workload install android ios maui
 
       - name: Setup NuGet
-        uses: nuget/setup-nuget@v2
+        uses: nuget/setup-nuget@d105a947828025cd7a980103c35ba2bfae586d0f # v2.0.2
 
       - name: Restore NuGet
         run: nuget restore Auth0.OidcClient.All.sln