diff --git a/.github/workflows/blocked.yaml b/.github/workflows/blocked.yaml
index 12a4b020..1e1bcf4c 100644
--- a/.github/workflows/blocked.yaml
+++ b/.github/workflows/blocked.yaml
@@ -1,7 +1,16 @@
 name: Prevent blocked
 on:
+  # zizmor: ignore[dangerous-triggers]
+  # Reason: This workflow does not checkout code or use secrets.
+  # It only reads labels to set a failure status on the PR.  
   pull_request_target:
     types: [opened, labeled, unlabeled, synchronize]
+
+permissions:
+  pull-requests: read
+  # Required to fail the check on the PR
+  statuses: write 
+
 jobs:
   prevent-blocked:
     name: Prevent blocked
diff --git a/.github/workflows/changelog-label.yml b/.github/workflows/changelog-label.yml
index 8d9acbc2..ccbf14b3 100644
--- a/.github/workflows/changelog-label.yml
+++ b/.github/workflows/changelog-label.yml
@@ -1,8 +1,16 @@
 name: PR changelog label
 
 on:
+  # zizmor: ignore[dangerous-triggers]
+  # This is safe because we do not use actions/checkout or execute untrusted code.
+  # Using pull_request_target is necessary to allow status writes for PRs from forks.
   pull_request_target:
     types: [labeled, unlabeled, opened]
+
+permissions:
+  pull-requests: read 
+  statuses: write
+
 jobs:
   pr-changelog-label:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/pr-deploy.yaml b/.github/workflows/pr-deploy.yaml
index 138ab2b5..ef0f3314 100644
--- a/.github/workflows/pr-deploy.yaml
+++ b/.github/workflows/pr-deploy.yaml
@@ -1,5 +1,7 @@
 name: Deploy previews for PRs
 on:
+  # zizmor: ignore[dangerous-triggers]
+  # Reason: This is now restricted to internal PRs only using the 'if' condition below.  
   workflow_run:
     workflows: ["Build"]
     types:
@@ -7,7 +9,14 @@ on:
 
 jobs:
   prdetails:
-    if: ${{ github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.event == 'pull_request' }}
+    # Logic:
+    # 1. Build must be successful
+    # 2. Event must be a pull_request
+    # 3. Head repository must be the SAME as the base repository (No Forks!)
+    if: >
+      github.event.workflow_run.conclusion == 'success' && 
+      github.event.workflow_run.event == 'pull_request' &&
+      github.event.workflow_run.head_repository.full_name == github.repository    
     runs-on: ubuntu-latest
     outputs:
       pr_number: ${{ steps.prdetails.outputs.pr_id }}