Container vulnerability scanning and dependency risk assessment using Grype with CVSS severity ratings, EPSS exploit probability, and CISA KEV indicators. Use when: (1) Scanning container images and filesystems for known vulnerabilities, (2) Integrating vulnerability scanning into CI/CD pipelines with severity thresholds, (3) Analyzing SBOMs (Syft, SPDX, CycloneDX) for security risks, (4) Prioritizing remediation based on threat metrics (CVSS, EPSS, KEV), (5) Generating vulnerability reports in multiple formats (JSON, SARIF, CycloneDX) for security toolchain integration.
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Container vulnerability scanning and dependency risk assessment using Grype with CVSS severity ratings, EPSS exploit probability, and CISA KEV indicators. Use when: (1) Scanning container images and filesystems for known vulnerabilities, (2) Integrating vulnerability scanning into CI/CD pipelines with severity thresholds, (3) Analyzing SBOMs (Syft, SPDX, CycloneDX) for security risks, (4) Prioritizing remediation based on threat metrics (CVSS, EPSS, KEV), (5) Generating vulnerability reports in multiple formats (JSON, SARIF, CycloneDX) for security toolchain integration.
Grype is an open-source vulnerability scanner that identifies known security flaws in container images,
filesystems, and Software Bill of Materials (SBOM) documents. It analyzes operating system packages
(Alpine, Ubuntu, Red Hat, Debian) and language-specific dependencies (Java, Python, JavaScript, Ruby,
Go, PHP, Rust) against vulnerability databases to detect CVEs.
Prioritize remediation: Focus on critical/high severity, CISA KEV, high EPSS scores
Apply fixes: Update vulnerable packages or base images
Re-scan: Verify vulnerabilities are resolved
CI/CD Integration with Fail Thresholds
For automated pipeline security gates:
# Fail build if any critical vulnerabilities found
grype <image> --fail-on critical
# Fail on high or critical severities
grype <image> --fail-on high
# Output JSON for further processing
grype <image> -o json > results.json
Pipeline integration pattern:
Build container image
Run Grype scan with --fail-on threshold
If scan fails: Block deployment, alert security team
If scan passes: Continue deployment workflow
Archive scan results as build artifacts
SBOM-Based Scanning
Use Grype with Syft-generated SBOMs for faster re-scanning:
# Generate SBOM with Syft (separate skill: sbom-syft)
syft <image> -o json > sbom.json
# Scan SBOM with Grype (faster than re-analyzing image)
grype sbom:sbom.json
# Pipe Syft output directly to Grype
syft <image> -o json | grype
Benefits of SBOM workflow:
Faster re-scans without re-analyzing image layers
Share SBOMs across security tools
Archive SBOMs for compliance and auditing
Risk Prioritization Workflow
Progress:
[ ] 1. Run full Grype scan with JSON output: grype <target> -o json > results.json
[ ] 2. Use helper script to extract high-risk CVEs: ./scripts/prioritize_cves.py results.json
[ ] 3. Review CISA KEV matches (actively exploited vulnerabilities)
[ ] 4. Check EPSS scores (exploit probability) for non-KEV findings
[ ] 5. Prioritize remediation: KEV > High EPSS > CVSS Critical > CVSS High
[ ] 6. Document remediation plan with CVE IDs and affected packages
[ ] 7. Apply fixes and re-scan to verify
Work through each step systematically. Check off completed items.
Output Formats
Grype supports multiple output formats for different use cases:
Table (default): Human-readable console output
grype <image>
JSON: Machine-parseable for automation
grype <image> -o json
SARIF: Static Analysis Results Interchange Format for IDE integration
grype <image> -o sarif
CycloneDX: SBOM format with vulnerability data
grype <image> -o cyclonedx-json
Template: Custom output using Go templates
grype <image> -o template -t custom-template.tmpl
Advanced Configuration
Filtering and Exclusions
Exclude specific file paths:
grype <image> --exclude '/usr/share/doc/**'
Filter by severity:
grype <image> --only-fixed # Only show vulnerabilities with available fixes
Custom Ignore Rules
Create .grype.yaml to suppress false positives:
ignore:# Ignore specific CVE-vulnerability:CVE-YYYY-XXXXXreason:"False positive - component not used"# Ignore CVE for specific package-vulnerability:CVE-YYYY-ZZZZZpackage:name:example-libversion:1.2.3reason:"Risk accepted - mitigation controls in place"
Database Management
Update vulnerability database:
grype db update
Check database status:
grype db status
Use specific database location:
grype <image> --db /path/to/database
Security Considerations
Sensitive Data Handling: Scan results may contain package names and versions that reveal
application architecture. Store results securely and limit access to authorized security personnel.
Access Control: Grype requires Docker socket access when scanning container images.
Restrict permissions to prevent unauthorized image access.
Audit Logging: Log all Grype scans with timestamps, target details, and operator identity
for compliance and incident response. Archive scan results for historical vulnerability tracking.
Compliance: Regular vulnerability scanning supports SOC2, PCI-DSS, NIST 800-53, and ISO 27001
requirements. Document scan frequency and remediation SLAs.
Safe Defaults: Use --fail-on critical as minimum threshold for production deployments.
Configure automated scans in CI/CD to prevent vulnerable images from reaching production.
Bundled Resources
Scripts (scripts/)
prioritize_cves.py - Parse Grype JSON output and prioritize CVEs by threat metrics (KEV, EPSS, CVSS)
grype_scan.sh - Wrapper script for consistent Grype scans with logging and threshold configuration
References (references/)
cvss_guide.md - CVSS severity rating system and score interpretation
cisa_kev.md - CISA Known Exploited Vulnerabilities catalog and remediation urgency
vulnerability_remediation.md - Common remediation patterns for dependency vulnerabilities
Assets (assets/)
grype-ci-config.yml - CI/CD pipeline configuration for Grype vulnerability scanning
grype-config.yaml - Example Grype configuration with common ignore patterns
Common Patterns
Pattern 1: Pre-Production Scanning
Scan before pushing images to registry:
# Build image
docker build -t myapp:latest .
# Scan locally before push
grype myapp:latest --fail-on critical
# If scan passes, push to registry
docker push myapp:latest
Pattern 2: Scheduled Scanning
Re-scan existing images for newly disclosed vulnerabilities:
# Scan all production images dailyfor image in $(docker images --format '{{.Repository}}:{{.Tag}}' | grep prod); do
grype $image -o json >> daily-scan-$(date +%Y%m%d).json
done
Pattern 3: Base Image Selection
Compare base images to choose least vulnerable option:
