diff --git a/.github/workflows/build-containers.yml b/.github/workflows/build-containers.yml
index b295d1e..64635f8 100644
--- a/.github/workflows/build-containers.yml
+++ b/.github/workflows/build-containers.yml
@@ -273,6 +273,7 @@ jobs:
       packages: write
       id-token: write  # Needed for OIDC token (sigstore)
       attestations: write  # Needed for attestations
+      security-events: write  # Needed for Trivy SARIF upload
 
     steps:
       - name: Checkout repository
@@ -446,6 +447,21 @@ jobs:
           # Clean up
           rm -f /tmp/security-attestation.json
 
+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@6e7b7d1fd3e4fef0c5fa8cce1229c54b2c9bd0d8 # 0.24.0
+        with:
+          image-ref: ${{ steps.meta.outputs.image_name }}:${{ steps.meta.outputs.version }}
+          format: 'sarif'
+          output: 'trivy-results.sarif'
+          severity: 'CRITICAL,HIGH,MEDIUM'
+
+      - name: Upload Trivy results to GitHub Security
+        uses: github/codeql-action/upload-sarif@4d9e1a6c3d9e0e8f7d1c2f3a4e5d6c7b8a9c0d1e # v3
+        if: always()
+        with:
+          sarif_file: 'trivy-results.sarif'
+          category: 'trivy-${{ steps.meta.outputs.server_name }}'
+
       - name: Generate image summary
         run: |
           echo "## Container Build Summary" >> $GITHUB_STEP_SUMMARY
@@ -455,18 +471,20 @@ jobs:
           echo "- **Image**: ${{ steps.meta.outputs.image_name }}" >> $GITHUB_STEP_SUMMARY
           echo "- **Version**: ${{ steps.meta.outputs.version }}" >> $GITHUB_STEP_SUMMARY
           echo "- **Platforms**: linux/amd64, linux/arm64" >> $GITHUB_STEP_SUMMARY
-          
+
           if [ "${{ github.event_name }}" != "pull_request" ]; then
             echo "- **SBOM**: ✅ Attested" >> $GITHUB_STEP_SUMMARY
             echo "- **Build Provenance**: ✅ Attested" >> $GITHUB_STEP_SUMMARY
             echo "- **Security Scan**: ✅ Attested" >> $GITHUB_STEP_SUMMARY
             echo "- **Signatures**: ✅ Signed with Sigstore/Cosign" >> $GITHUB_STEP_SUMMARY
+            echo "- **Trivy Scan**: ✅ Completed (see Security tab)" >> $GITHUB_STEP_SUMMARY
             echo "- **Status**: ✅ Built, pushed, signed, and attested" >> $GITHUB_STEP_SUMMARY
             echo "- **Tags**:" >> $GITHUB_STEP_SUMMARY
             echo "  - ${{ steps.meta.outputs.image_name }}:${{ steps.meta.outputs.version }}" >> $GITHUB_STEP_SUMMARY
             echo "  - ${{ steps.meta.outputs.image_name }}:latest" >> $GITHUB_STEP_SUMMARY
             echo "- **Digest**: ${{ steps.build.outputs.digest }}" >> $GITHUB_STEP_SUMMARY
           else
+            echo "- **Trivy Scan**: ✅ Completed (see Security tab)" >> $GITHUB_STEP_SUMMARY
             echo "- **Status**: ✅ Built (not pushed - PR)" >> $GITHUB_STEP_SUMMARY
           fi
 
diff --git a/.github/workflows/periodic-security-scan.yml b/.github/workflows/periodic-security-scan.yml
new file mode 100644
index 0000000..c560191
--- /dev/null
+++ b/.github/workflows/periodic-security-scan.yml
@@ -0,0 +1,227 @@
+name: Periodic Container Security Scan
+
+on:
+  schedule:
+    - cron: '0 2 * * 1'  # Weekly on Monday at 2am UTC
+  workflow_dispatch:  # Allow manual trigger
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  discover-published-images:
+    runs-on: ubuntu-latest
+    outputs:
+      configs: ${{ steps.find-configs.outputs.configs }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6
+
+      - name: Find all configuration files
+        id: find-configs
+        run: |
+          # Find all spec.yaml files - scan all published images
+          all_configs=$(find npx uvx go -name "spec.yaml" -type f 2>/dev/null | sort)
+          configs_json=$(echo "$all_configs" | jq -R -s -c 'split("\n")[:-1]')
+
+          echo "configs=$configs_json" >> $GITHUB_OUTPUT
+          echo "Found $(echo "$all_configs" | wc -l) configurations to scan"
+
+  scan-images:
+    needs: discover-published-images
+    runs-on: ubuntu-latest
+    if: ${{ needs.discover-published-images.outputs.configs != '[]' }}
+    strategy:
+      matrix:
+        config: ${{ fromJson(needs.discover-published-images.outputs.configs) }}
+      fail-fast: false
+
+    permissions:
+      contents: read
+      packages: read
+      security-events: write
+      issues: write  # To create issues for critical findings
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6
+
+      - name: Install yq
+        uses: mikefarah/yq@45be35c06387d692bb6bf689919919e0e32e796f # v4.49.1
+
+      - name: Extract metadata from config
+        id: meta
+        run: |
+          config_file="${{ matrix.config }}"
+          protocol=$(echo "$config_file" | cut -d'/' -f1)
+          server_name=$(echo "$config_file" | cut -d'/' -f2)
+
+          echo "protocol=$protocol" >> $GITHUB_OUTPUT
+          echo "server_name=$server_name" >> $GITHUB_OUTPUT
+
+          # Extract version
+          spec_version=$(yq '.spec.version' "$config_file" 2>/dev/null || echo "")
+          if [ -n "$spec_version" ]; then
+            version="$spec_version"
+          else
+            version="latest"
+          fi
+          echo "version=$version" >> $GITHUB_OUTPUT
+
+          # Generate image name
+          image_name="${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}/${protocol}/${server_name}"
+          echo "image_name=$image_name" >> $GITHUB_OUTPUT
+          echo "image_ref=${image_name}:${version}" >> $GITHUB_OUTPUT
+
+      - name: Log in to Container Registry
+        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Run Trivy comprehensive scan
+        uses: aquasecurity/trivy-action@6e7b7d1fd3e4fef0c5fa8cce1229c54b2c9bd0d8 # 0.24.0
+        with:
+          image-ref: ${{ steps.meta.outputs.image_ref }}
+          format: 'sarif'
+          output: 'trivy-results.sarif'
+          severity: 'CRITICAL,HIGH,MEDIUM,LOW'
+          scanners: 'vuln,secret,config,license'
+          timeout: '15m'
+
+      - name: Upload SARIF to GitHub Security
+        uses: github/codeql-action/upload-sarif@4d9e1a6c3d9e0e8f7d1c2f3a4e5d6c7b8a9c0d1e # v3
+        if: always()
+        with:
+          sarif_file: 'trivy-results.sarif'
+          category: 'periodic-trivy-${{ steps.meta.outputs.server_name }}'
+
+      - name: Run Trivy for detailed JSON report
+        uses: aquasecurity/trivy-action@6e7b7d1fd3e4fef0c5fa8cce1229c54b2c9bd0d8 # 0.24.0
+        with:
+          image-ref: ${{ steps.meta.outputs.image_ref }}
+          format: 'json'
+          output: 'trivy-results.json'
+          severity: 'CRITICAL,HIGH,MEDIUM,LOW,UNKNOWN'
+          scanners: 'vuln,secret,config,license'
+          timeout: '15m'
+
+      - name: Check for critical issues
+        id: check-critical
+        run: |
+          critical=$(jq '[.Results[]?.Vulnerabilities[]? | select(.Severity == "CRITICAL")] | length' trivy-results.json)
+          high=$(jq '[.Results[]?.Vulnerabilities[]? | select(.Severity == "HIGH")] | length' trivy-results.json)
+          secrets=$(jq '[.Results[]?.Secrets[]?] | length' trivy-results.json)
+
+          echo "critical=$critical" >> $GITHUB_OUTPUT
+          echo "high=$high" >> $GITHUB_OUTPUT
+          echo "secrets=$secrets" >> $GITHUB_OUTPUT
+
+          if [ "$critical" -gt 0 ] || [ "$secrets" -gt 0 ]; then
+            echo "should_create_issue=true" >> $GITHUB_OUTPUT
+          else
+            echo "should_create_issue=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Create issue for critical findings
+        if: steps.check-critical.outputs.should_create_issue == 'true'
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8
+        with:
+          script: |
+            const fs = require('fs');
+            const results = JSON.parse(fs.readFileSync('trivy-results.json', 'utf8'));
+
+            const critical = ${{ steps.check-critical.outputs.critical }};
+            const high = ${{ steps.check-critical.outputs.high }};
+            const secrets = ${{ steps.check-critical.outputs.secrets }};
+
+            let body = `## 🚨 Security Scan Alert\n\n`;
+            body += `A periodic security scan found critical issues in the container image:\n\n`;
+            body += `- **Image**: \`${{ steps.meta.outputs.image_ref }}\`\n`;
+            body += `- **Critical vulnerabilities**: ${critical}\n`;
+            body += `- **High vulnerabilities**: ${high}\n`;
+            body += `- **Secrets detected**: ${secrets}\n\n`;
+
+            body += `### Details\n\n`;
+            body += `See the [Security tab](../../security/code-scanning) for full details.\n\n`;
+
+            if (critical > 0) {
+              body += `#### Critical Vulnerabilities\n\n`;
+              const criticalVulns = results.Results.flatMap(r =>
+                (r.Vulnerabilities || []).filter(v => v.Severity === 'CRITICAL').slice(0, 5)
+              );
+
+              for (const vuln of criticalVulns) {
+                body += `- **${vuln.VulnerabilityID}** in \`${vuln.PkgName}\`: ${vuln.Title || 'No title'}\n`;
+              }
+
+              if (critical > 5) {
+                body += `\n_... and ${critical - 5} more. See Security tab for complete list._\n`;
+              }
+            }
+
+            if (secrets > 0) {
+              body += `\n⚠️ **${secrets} potential secret(s) detected in the image!**\n`;
+            }
+
+            body += `\n---\n`;
+            body += `_Automated security scan from [periodic-security-scan workflow](../actions/workflows/periodic-security-scan.yml)_`;
+
+            // Check if an issue already exists for this image
+            const { data: issues } = await github.rest.issues.listForRepo({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              state: 'open',
+              labels: 'security,trivy',
+            });
+
+            const existingIssue = issues.find(issue =>
+              issue.title.includes('${{ steps.meta.outputs.server_name }}')
+            );
+
+            if (existingIssue) {
+              // Update existing issue
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: existingIssue.number,
+                body: `## Updated Scan Results\n\n${body}`
+              });
+              console.log(`Updated existing issue #${existingIssue.number}`);
+            } else {
+              // Create new issue
+              await github.rest.issues.create({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                title: `🚨 Security: Critical issues in ${{ steps.meta.outputs.server_name }} container`,
+                body: body,
+                labels: ['security', 'trivy', 'critical']
+              });
+              console.log('Created new security issue');
+            }
+
+      - name: Upload scan results
+        if: always()
+        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5
+        with:
+          name: periodic-scan-${{ steps.meta.outputs.server_name }}
+          path: |
+            trivy-results.json
+            trivy-results.sarif
+          retention-days: 90
+
+  summary:
+    needs: scan-images
+    runs-on: ubuntu-latest
+    if: always()
+    steps:
+      - name: Generate summary
+        run: |
+          echo "## Periodic Security Scan Complete" >> $GITHUB_STEP_SUMMARY
+          echo "- **Scan Type**: Comprehensive (vulnerabilities, secrets, configs, licenses)" >> $GITHUB_STEP_SUMMARY
+          echo "- **Severity Levels**: CRITICAL, HIGH, MEDIUM, LOW" >> $GITHUB_STEP_SUMMARY
+          echo "- **Status**: ${{ needs.scan-images.result }}" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "View detailed results in the [Security tab](../../security/code-scanning)." >> $GITHUB_STEP_SUMMARY
diff --git a/README.md b/README.md
index 7e2e6d9..9d622e5 100644
--- a/README.md
+++ b/README.md
@@ -309,27 +309,56 @@ cosign verify-attestation \
 
 Note: Security scan attestations are only created when the MCP security scan runs and produces results for that specific image build.
 
+### Container Vulnerability Scanning
+
+All built container images are scanned for vulnerabilities using [Trivy](https://trivy.dev/), checking for:
+
+- **Vulnerabilities**: CVEs in OS packages and application dependencies (CRITICAL, HIGH, MEDIUM severity)
+- **Secrets**: Exposed API keys, tokens, credentials
+- **Misconfigurations**: Security issues in container configuration
+
+Scan results are:
+- Uploaded to the **GitHub Security** tab for each repository
+- Available in the **Security** → **Code scanning** section
+- Non-blocking for PRs (informational only)
+- Automatically run on every build and weekly via periodic scans
+
+To view scan results:
+```bash
+# Navigate to: https://github.com/stacklok/dockyard/security/code-scanning
+# Filter by "trivy-{server-name}" to see specific results
+```
+
+Trivy scans run:
+1. **On every PR**: Provides immediate feedback on new/changed containers
+2. **On main branch**: Scans all published images after build
+3. **Weekly (Monday 2am UTC)**: Comprehensive periodic scans to catch newly disclosed CVEs
+4. **Manual trigger**: Run periodic scans on-demand via GitHub Actions
+
 ### Security Guarantees
 
 When you use a Dockyard container image, you can be confident that:
 
 1. **Source Integrity**: The image was built from the exact source code in this repository
 2. **Build Transparency**: Full build provenance is available and verifiable
-3. **Security Scanning**: The MCP server was scanned for security vulnerabilities before packaging
-4. **Dependency Tracking**: Complete SBOM is available for vulnerability management
-5. **Non-repudiation**: Signatures prove the image came from our CI/CD pipeline
+3. **MCP Security Scanning**: The MCP server was scanned for security vulnerabilities before packaging
+4. **Container Vulnerability Scanning**: Container images are scanned with Trivy for CVEs, secrets, and misconfigurations
+5. **Dependency Tracking**: Complete SBOM is available for vulnerability management
+6. **Non-repudiation**: Signatures prove the image came from our CI/CD pipeline
+7. **Continuous Monitoring**: Weekly scans catch newly disclosed vulnerabilities in published images
 
 ## 🏗️ How It Works
 
 1. **Detection**: GitHub Actions detects changes to YAML files
 2. **Provenance Verification**: Verifies package provenance using `dockhand verify-provenance` (informational)
-3. **Security Scan**: Runs mcp-scan to check for vulnerabilities (blocking)
+3. **MCP Security Scan**: Runs mcp-scan to check for MCP-specific vulnerabilities (blocking)
 4. **Validation**: Validates YAML structure and required fields
 5. **Protocol Scheme**: Constructs protocol scheme (e.g., `npx://@upstash/context7-mcp@1.0.14`)
 6. **Container Build**: Uses ToolHive's `BuildFromProtocolSchemeWithName` function (only if security scan passes)
-7. **Attestation**: Creates and signs SBOM, provenance, and security scan attestations
-8. **Publishing**: Pushes to GitHub Container Registry with automatic tagging
-9. **Updates**: Renovate automatically creates PRs for new package versions
+7. **Container Vulnerability Scan**: Scans built images with Trivy for CVEs, secrets, and misconfigurations (non-blocking)
+8. **Attestation**: Creates and signs SBOM, provenance, and security scan attestations
+9. **Publishing**: Pushes to GitHub Container Registry with automatic tagging
+10. **Updates**: Renovate automatically creates PRs for new package versions
 
 ### CI/CD Pipeline
 
@@ -339,12 +368,14 @@ The CI/CD pipeline runs in this order:
 graph TD
     A[Discover Configs] --> B[Verify Provenance]
     B --> C[MCP Security Scan]
-    C --> D{Security Passed?}
+    C --> D{MCP Scan Passed?}
     D -->|Yes| E[Build Containers]
     D -->|No| F[Fail Build]
-    E --> G[Sign with Cosign]
-    G --> H[Create Attestations]
-    H --> I[Push to Registry]
+    E --> G[Trivy Vulnerability Scan]
+    G --> H[Sign with Cosign]
+    H --> I[Create Attestations]
+    I --> J[Push to Registry]
+    J --> K[Upload Trivy Results to Security Tab]
 ```
 
 **Provenance verification** is informational and does not block builds - it helps track which packages have cryptographic verification available.