diff --git a/.github/workflows/gif_check.yml b/.github/workflows/gif_check.yml
index 6d7e96ca29e8b..0d6e507d77dc2 100644
--- a/.github/workflows/gif_check.yml
+++ b/.github/workflows/gif_check.yml
@@ -24,13 +24,30 @@ jobs:
           fetch-depth: 0
           persist-credentials: false
 
+    # Branch Name Validation to be run prior to workflow
+    - name: Validate branch name and set output
+      id: validate
+      run: |
+        BRANCH="${{ github.head_ref }}"
+        # Allow: letters, numbers, dots, hyphens, underscores, and forward slash
+        # This supports the required <name>/<description> format like "user.name/test-this-new-feature"
+        if [[ "$BRANCH" =~ ^[a-zA-Z0-9._/-]+$ ]] && [[ ${#BRANCH} -le 200 ]]; then
+          echo "valid=true" >> $GITHUB_OUTPUT
+          echo "branch=$BRANCH" >> $GITHUB_OUTPUT
+        else
+          echo "valid=false" >> $GITHUB_OUTPUT
+          echo "::error::Invalid branch name detected. Branch names must only contain letters, numbers, dots, hyphens, underscores, and forward slashes (max 200 chars)"
+        fi
+
     - name: Find changed files
       id: changed_files
+      if: steps.validate.outputs.valid == 'true'
       uses: tj-actions/changed-files@9200e69727eb73eb060652b19946b8a2fdfb654b # v45.0.8
 
     - name: Look for gifs
+      if: steps.validate.outputs.valid == 'true'
       env:
-        branch: ${{ github.head_ref }}
+        branch: ${{ steps.validate.outputs.branch }}
         ALL_CHANGED_FILES: ${{ steps.changed_files.outputs.all_changed_files }}
       id: comment_body
       run: |
diff --git a/.github/workflows/preview_link.yml b/.github/workflows/preview_link.yml
index 406ea02087a22..b032bad7ef9d8 100644
--- a/.github/workflows/preview_link.yml
+++ b/.github/workflows/preview_link.yml
@@ -30,15 +30,32 @@ jobs:
         python-version: '3.10'
     - run: pip install Mako docutils
 
+    # Branch Name Validation to be run prior to workflow
+    - name: Validate branch name and set output
+      id: validate
+      run: |
+        BRANCH="${{ github.head_ref }}"
+        # Allow: letters, numbers, dots, hyphens, underscores, and forward slash
+        # This supports the required <name>/<description> format like "user.name/test-this-new-feature"
+        if [[ "$BRANCH" =~ ^[a-zA-Z0-9._/-]+$ ]] && [[ ${#BRANCH} -le 200 ]] && [[ "$BRANCH" == *"/"* ]]; then
+          echo "valid=true" >> $GITHUB_OUTPUT
+          echo "branch=$BRANCH" >> $GITHUB_OUTPUT
+        else
+          echo "valid=false" >> $GITHUB_OUTPUT
+          echo "::error::Invalid branch name detected. Branch names must contain a forward slash and only contain letters, numbers, dots, hyphens, underscores, and forward slashes (max 200 chars)"
+        fi
+
     - name: Find changed files
       id: changed_files
+      if: steps.validate.outputs.valid == 'true'
       uses: tj-actions/changed-files@9200e69727eb73eb060652b19946b8a2fdfb654b # v45.0.8
       with:
         include_all_old_new_renamed_files: true
 
     - name: Generate links
+      if: steps.validate.outputs.valid == 'true'
       env:
-        branch: ${{ github.head_ref }}
+        branch: ${{ steps.validate.outputs.branch }}
         DELETED_FILES: ${{ steps.changed_files.outputs.deleted_files }}
         RENAMED_FILES: ${{ steps.changed_files.outputs.renamed_files }}
         MODIFIED_FILES: ${{ steps.changed_files.outputs.modified_files }}
@@ -51,12 +68,14 @@ jobs:
         --added="${ADDED_FILES}"
 
     - name: Render template
+      if: steps.validate.outputs.valid == 'true'
       id: template
       uses: chuhlomin/render-template@a473db625a96c98e519d188812dc22bcaf54ffba # v1.9.0
       with:
         template: .github/preview-links-template.md
 
     - name: Find existing comment
+      if: steps.validate.outputs.valid == 'true'
       uses: peter-evans/find-comment@3eae4d37986fb5a8592848f6a574fdf654e61f9e # v3.1.0
       id: find_comment
       with:
@@ -65,6 +84,7 @@ jobs:
         body-includes: "Preview links ("
 
     - name: Post comment
+      if: steps.validate.outputs.valid == 'true'
       uses: peter-evans/create-or-update-comment@71345be0265236311c031f5c7866368bd1eff043 # v4.0.0
       with:
         issue-number: ${{ github.event.pull_request.number }}
diff --git a/.github/workflows/synthetics.yml b/.github/workflows/synthetics.yml
index a87657bd8cf62..609051cf90b8b 100644
--- a/.github/workflows/synthetics.yml
+++ b/.github/workflows/synthetics.yml
@@ -24,15 +24,28 @@ jobs:
           sparse-checkout: |
             .
 
-      - name: Extract branch name
-        shell: bash
-        run: echo "branch=$(echo ${{ github.event.pull_request.head.ref }})" >>$GITHUB_OUTPUT
-        id: extract_branch
+      # Branch Name Validation to be run prior to workflow
+      - name: Validate branch name and set output
+        id: validate
+        run: |
+          BRANCH="${{ github.event.pull_request.head.ref }}"
+          # Allow: letters, numbers, dots, hyphens, underscores, and forward slash
+          # This supports the required <name>/<description> format like "user.name/test-this-new-feature"
+          if [[ "$BRANCH" =~ ^[a-zA-Z0-9._/-]+$ ]] && [[ ${#BRANCH} -le 200 ]]; then
+            echo "valid=true" >> $GITHUB_OUTPUT
+            echo "branch=$BRANCH" >> $GITHUB_OUTPUT
+          else
+            echo "valid=false" >> $GITHUB_OUTPUT
+            echo "::error::Invalid branch name detected. Branch names must only contain letters, numbers, dots, hyphens, underscores, and forward slashes (max 200 chars)"
+          fi
 
       - name: Check preview status
         id: check-status
+        if: steps.validate.outputs.valid == 'true'
         run: |
-          URL="https://docs-staging.datadoghq.com/${{steps.extract_branch.outputs.branch}}"
+          # Use the validated branch name from previous step
+          BRANCH="${{ steps.validate.outputs.branch }}"
+          URL="https://docs-staging.datadoghq.com/${BRANCH}"
           SUCCESS_CODES=("200" "302" "304")
           for i in {1..30}
           do
@@ -52,9 +65,10 @@ jobs:
           done
 
       - name: Run Datadog Synthetic tests
+        if: steps.validate.outputs.valid == 'true'
         uses: DataDog/synthetics-ci-github-action@d77d9c9a6228ff9b17a4e0056fb94d8c8010d79c # v1.3.0
         env:
-          CI_COMMIT_REF_NAME: ${{steps.extract_branch.outputs.branch}}
+          CI_COMMIT_REF_NAME: ${{ steps.validate.outputs.branch }}
         with:
           api_key: ${{secrets.DD_API_KEY}}
           app_key: ${{secrets.DD_APP_KEY}}