diff --git a/.github/workflows/manual-vuln-check.yaml b/.github/workflows/manual-vuln-check.yaml
index 5213f2fd..c6bf30f7 100644
--- a/.github/workflows/manual-vuln-check.yaml
+++ b/.github/workflows/manual-vuln-check.yaml
@@ -8,5 +8,3 @@ jobs:
     uses: ./.github/workflows/vuln-check.yaml
     with:
       target-ref: ${{ github.ref_name }}
-    secrets:
-      CR_PAT: ${{ secrets.CR_PAT }}
diff --git a/.github/workflows/scheduled-vuln-check.yaml b/.github/workflows/scheduled-vuln-check.yaml
index f8e6fe1c..c6878d7a 100644
--- a/.github/workflows/scheduled-vuln-check.yaml
+++ b/.github/workflows/scheduled-vuln-check.yaml
@@ -11,7 +11,6 @@ jobs:
     with:
       target-ref: master
     secrets:
-      CR_PAT: ${{ secrets.CR_PAT }}
       SLACK_SECURITY_WEBHOOK_URL: ${{ secrets.SLACK_SECURITY_WEBHOOK_URL }}
 
   call-vuln-check-for-v3_9:
@@ -20,7 +19,6 @@ jobs:
       target-ref: v3.9
       find-latest-release: true
     secrets:
-      CR_PAT: ${{ secrets.CR_PAT }}
       SLACK_SECURITY_WEBHOOK_URL: ${{ secrets.SLACK_SECURITY_WEBHOOK_URL }}
 
   call-vuln-check-for-v3_10:
@@ -29,7 +27,6 @@ jobs:
       target-ref: v3.10
       find-latest-release: true
     secrets:
-      CR_PAT: ${{ secrets.CR_PAT }}
       SLACK_SECURITY_WEBHOOK_URL: ${{ secrets.SLACK_SECURITY_WEBHOOK_URL }}
 
   call-vuln-check-for-v3_11:
@@ -38,5 +35,4 @@ jobs:
       target-ref: v3.11
       find-latest-release: true
     secrets:
-      CR_PAT: ${{ secrets.CR_PAT }}
       SLACK_SECURITY_WEBHOOK_URL: ${{ secrets.SLACK_SECURITY_WEBHOOK_URL }}
diff --git a/.github/workflows/vuln-check.yaml b/.github/workflows/vuln-check.yaml
index ffc8f903..29f4b08c 100644
--- a/.github/workflows/vuln-check.yaml
+++ b/.github/workflows/vuln-check.yaml
@@ -14,8 +14,6 @@ on:
         type: boolean
         default: false
     secrets:
-      CR_PAT:
-        required: true
       SLACK_SECURITY_WEBHOOK_URL:
         required: false
 
@@ -27,5 +25,4 @@ jobs:
       find-latest-release: ${{ inputs.find-latest-release }}
       images: '[["ScalarDL Ledger", "scalardl-ledger"], ["ScalarDL Client", "scalardl-client"]]'
     secrets:
-      CR_PAT: ${{ secrets.CR_PAT }}
       SLACK_SECURITY_WEBHOOK_URL: ${{ secrets.SLACK_SECURITY_WEBHOOK_URL }}