FedRAMP Container Scanning: Tools & Compliance Guide
If you're a cloud service provider (CSP) running containers in a FedRAMP boundary, the Vulnerability Scanning Requirements for Containers set a specific — and strict — bar. This guide walks through the controls, remediation SLAs, SBOM delivery, DoD Iron Bank workflow, and the best FedRAMP container scanning tools in 2026.
FedRAMP Container Scanning Requirements, in Plain English
The FedRAMP Vulnerability Scanning Requirements for Containers (and FedRAMP Rev. 5) require CSPs to:
- Scan every image for OS and application vulnerabilities before deployment and continuously thereafter.
- Use authenticated scanning for OS packages — not surface metadata.
- Track findings against CVE and KEV (Known Exploited Vulnerabilities) catalogs.
- Produce an SBOM (CycloneDX or SPDX) per image, attached to the artifact.
- Enforce hardened base images and signed-image policy with SLSA-aligned attestation.
- Report vulnerabilities on the 30/90/180-day SLA (Critical / High / Moderate).
- Provide 3PAO-ready evidence of scanning, remediation, and exception tracking.
Remediation SLAs: 30 / 90 / 180
| Severity | Remediation window | Exception path |
|---|---|---|
| Critical | 30 days | POA&M with CISO signoff |
| High | 90 days | POA&M |
| Moderate | 180 days | Risk acceptance |
KEV-catalog items frequently trigger a tighter internal SLA regardless of CVSS score.
SBOM Delivery
FedRAMP (and EO 14028) requires SBOMs for every image. Practical requirements:
- Format: CycloneDX or SPDX. CycloneDX is more common in security tooling.
- Signed and attached to the image via Sigstore/Cosign.
- Stored for the lifetime of the deployed image plus audit retention.
- Searchable: when a new CVE drops, you must be able to query SBOMs for exposure.
See the SCA vs SBOM guide.
Best FedRAMP Container Scanning Tools in 2026
- TigerGate — FedRAMP-aligned scanning, SBOM generation (CycloneDX + SPDX), signed-image policy, air-gapped self-hosted deployment. 3PAO-ready evidence capture.
- Anchore Enterprise — strong SBOM focus, Iron Bank partnership.
- Prisma Cloud (Palo Alto) — enterprise CNAPP with FedRAMP High ATO on the SaaS side.
- Aqua Security — container-first platform with FedRAMP-friendly workflows.
- Trivy + Grype + Cosign (open source) — zero license cost, high integration cost.
DoD Container Scanning Tools & Iron Bank
DoD programs land containers in Iron Bank, the DoD's hardened container registry run by Platform One. Iron Bank images are signed, scanned, and audited to pass directly into IL4/IL5 environments without a parallel review process.
What the DoD container pipeline looks like:
- Build on a hardened base (Iron Bank, Chainguard, or Red Hat UBI).
- Scan for CVEs, STIG applicability, and license issues.
- Generate SBOM and sign with Cosign.
- Submit to Iron Bank pipeline for independent validation.
- Deploy into IL4/IL5 via Platform One (Big Bang, Flux).
DoD-oriented tools must support air-gapped deployment and offline vulnerability feeds. TigerGate self-hosted and Anchore both do; most SaaS CNAPPs don't.
Evidence Automation for 3PAO
The hardest part of FedRAMP container scanning isn't finding vulnerabilities — it's proving to the 3PAO that you found them, remediated them on SLA, and tracked exceptions. Automated evidence capture (every scan, every exception, every signoff) is the single biggest time-saver for annual ConMon. See compliance automation.
FAQ
Does FedRAMP Low require container scanning?
If you deploy containers, yes. The container VSR applies regardless of baseline.
Can I use the same tool for FedRAMP and DoD Iron Bank?
Yes, if it supports air-gapped deployment, hardened base image policy, and the appropriate SBOM formats. TigerGate self-hosted does.
What about CSPs on the FedRAMP Low to Moderate transition?
Container scanning requirements don't change substantially between Low and Moderate; the broader SSP control count changes.
How often do images need to be rescanned?
At least weekly for continuous monitoring, with a fresh scan on every rebuild. Daily is better.
FedRAMP-Ready Container Security
TigerGate ships FedRAMP-aligned container scanning, SBOM, and evidence automation in one platform — including air-gapped deployment for IL4/IL5.
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