diff --git a/.github/workflows/move-major-tag.yml b/.github/workflows/move-major-tag.yml
index d25f44a..7f8bc82 100644
--- a/.github/workflows/move-major-tag.yml
+++ b/.github/workflows/move-major-tag.yml
@@ -1,5 +1,6 @@
 name: Move Major Tag
 
+# checkov:skip=CKV_GHA_7:Manual tag input is required to repair or remap a specific stable release.
 on:
   release:
     types:
@@ -11,12 +12,13 @@ on:
         required: false
         type: string
 
-permissions:
-  contents: write
+permissions: {} # Deny token access by default; the tag-moving job grants only tag update access.
 
 jobs:
   move-major-tag:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write # Required to move the major release tag.
     steps:
       - name: Checkout
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
diff --git a/.github/workflows/project-automation.yml b/.github/workflows/project-automation.yml
index dc16684..fbb1131 100644
--- a/.github/workflows/project-automation.yml
+++ b/.github/workflows/project-automation.yml
@@ -6,8 +6,7 @@ on:
   pull_request:
     types: [opened, reopened]
 
-permissions:
-  contents: read # Required by the reusable project-routing workflows.
+permissions: {} # Deny token access by default; project-routing jobs grant read access.
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.event.issue.number || github.event.pull_request.number }}
@@ -17,6 +16,8 @@ jobs:
   add-issue-to-projects:
     if: github.event_name == 'issues'
     uses: datasciencecampus/github-actions/.github/workflows/add-issue-to-projects.yml@caf4ab7c789a34efb07d61113830bcb67d634a38 # v1.7.0
+    permissions:
+      contents: read # Required by the reusable issue-routing workflow.
     secrets:
       PROJECT_ROUTER_BOT_PRIVATE_KEY: ${{ secrets.PROJECT_ROUTER_BOT_PRIVATE_KEY }}
     with:
@@ -27,6 +28,8 @@ jobs:
   add-pr-to-projects:
     if: github.event_name == 'pull_request'
     uses: datasciencecampus/github-actions/.github/workflows/add-pr-to-projects.yml@caf4ab7c789a34efb07d61113830bcb67d634a38 # v1.7.0
+    permissions:
+      contents: read # Required by the reusable pull-request routing workflow.
     secrets:
       PROJECT_ROUTER_BOT_PRIVATE_KEY: ${{ secrets.PROJECT_ROUTER_BOT_PRIVATE_KEY }}
     with:
diff --git a/.github/workflows/release-please.yml b/.github/workflows/release-please.yml
index c992771..96cf9d8 100644
--- a/.github/workflows/release-please.yml
+++ b/.github/workflows/release-please.yml
@@ -6,13 +6,14 @@ on:
       - main
   workflow_dispatch:
 
-permissions:
-  contents: write
-  pull-requests: write
+permissions: {} # Deny token access by default; the release job grants only what it needs.
 
 jobs:
   release-please:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write # Required to create release commits and move the major tag.
+      pull-requests: write # Required to create and update release pull requests.
     steps:
       - name: Checkout
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
diff --git a/.github/workflows/security-analysis.yml b/.github/workflows/security-analysis.yml
new file mode 100644
index 0000000..de2dd6c
--- /dev/null
+++ b/.github/workflows/security-analysis.yml
@@ -0,0 +1,24 @@
+name: Security Analysis
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+run-name: "${{ github.workflow }} - ${{ github.actor }} - ${{ github.event_name == 'pull_request' && format('PR #{0}', github.event.pull_request.number) || github.ref_name }}"
+
+permissions: {} # Deny token access by default; jobs grant only what they need.
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  security-analysis:
+    name: security-analysis
+    permissions:
+      actions: read # Required for SARIF upload metadata lookups in private or internal repositories.
+      contents: read # Required to read repository contents during analysis.
+      security-events: write # Required to upload security analysis results.
+    uses: datasciencecampus/github-actions/.github/workflows/security-analysis.yml@caf4ab7c789a34efb07d61113830bcb67d634a38 # v1.7.0
\ No newline at end of file
diff --git a/.github/workflows/test-reusable-workflow-contract.yml b/.github/workflows/test-reusable-workflow-contract.yml
index a3a5940..03b9352 100644
--- a/.github/workflows/test-reusable-workflow-contract.yml
+++ b/.github/workflows/test-reusable-workflow-contract.yml
@@ -1,7 +1,6 @@
 name: Test reusable workflow contract
 
-permissions:
-  contents: read
+permissions: {} # Deny token access by default; the reusable workflow job grants read access.
 
 on:
   workflow_dispatch:
@@ -17,6 +16,8 @@ on:
 jobs:
   invoke-reusable-workflow:
     uses: ./.github/workflows/update-tf-modules.yml
+    permissions:
+      contents: read # Required for the reusable workflow contract test to read repository contents.
     with:
       manifest_path: .github/update-modules-manifest.yml
       create_pr: false
diff --git a/.github/workflows/test-suite.yml b/.github/workflows/test-suite.yml
index c628bdd..ba9ab91 100644
--- a/.github/workflows/test-suite.yml
+++ b/.github/workflows/test-suite.yml
@@ -4,12 +4,13 @@ on:
   pull_request:
     branches: [ "main" ] 
 
-permissions:
-  contents: read
+permissions: {} # Deny token access by default; the test job grants checkout access.
 
 jobs:
   run-tests:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read # Required to check out the repository before running tests.
 
     steps:
       - name: Checkout code
diff --git a/.github/workflows/update-tf-modules.yml b/.github/workflows/update-tf-modules.yml
index 072334a..f31d34c 100644
--- a/.github/workflows/update-tf-modules.yml
+++ b/.github/workflows/update-tf-modules.yml
@@ -1,5 +1,6 @@
 name: Update Terraform module versions
 
+# checkov:skip=CKV_GHA_7:Manual inputs are required to select the manifest, Terraform root, target branch, updater ref, and PR behavior.
 on:
   workflow_call:
     inputs:
@@ -70,6 +71,9 @@ on:
         required: false
         default: v0
         type: string
+
+permissions: {} # Deny token access by default; the update job grants only the write access it needs.
+
 concurrency:
   group: update-tf-modules-${{ github.repository }}-${{ inputs.base_branch || github.ref_name }}
   cancel-in-progress: false
@@ -78,8 +82,8 @@ jobs:
   update-modules:
     runs-on: ubuntu-latest
     permissions:
-      contents: write
-      pull-requests: write
+      contents: write # Required to commit updated Terraform module versions.
+      pull-requests: write # Required to create and update the automated pull request.
     outputs:
       changed: ${{ steps.detect_changes.outputs.changed }}
       pr_number: ${{ steps.create_pull_request.outputs.pull-request-number }}
diff --git a/configs/checkov.yml b/configs/checkov.yml
new file mode 100644
index 0000000..2a8e24b
--- /dev/null
+++ b/configs/checkov.yml
@@ -0,0 +1,11 @@
+compact: true
+directory:
+  - .
+download-external-modules: false
+evaluate-variables: true
+framework: github_actions
+output: cli
+quiet: true
+soft-fail: false
+skip-check:
+summary-position: bottom
\ No newline at end of file
diff --git a/configs/zizmor.yaml b/configs/zizmor.yaml
new file mode 100644
index 0000000..3b7c80b
--- /dev/null
+++ b/configs/zizmor.yaml
@@ -0,0 +1 @@
+rules: {}
\ No newline at end of file