trivy-compromise-scanner

trivy-compromise-scanner

A CLI tool to audit GitHub Actions workflow run logs for evidence of the aquasecurity/trivy supply chain compromise (2026-03-19 to 2026-03-20).

It scans your repositories' workflow run logs within the compromise window, searching for any run that used a compromised action reference or commit SHA.

Installation

Using go install (recommended)

go install github.com/step-security/trivy-compromise-scanner@latest

This installs the trivy-compromise-scanner binary to your $GOPATH/bin.

Build from source

git clone https://github.com/step-security/trivy-compromise-scanner
cd trivy-compromise-scanner
go build -o trivy-compromise-scanner .

Requires Go 1.25+.

Usage

trivy-compromise-scanner [flags]

Flags

At least one of --org or --repo is required.

Required PAT Scopes

• repo (or public_repo for public repos only) — to list workflow runs and download logs
• read:org — required when scanning organizations with --org

Examples

# Validate PAT permissions without scanning
trivy-compromise-scanner--token $GITHUB_TOKEN --repo owner/repo --dry-run

# Scan a single repo, output JSON to stdout
trivy-compromise-scanner--token $GITHUB_TOKEN --repo owner/repo

# Scan a single repo, save JSON to file
trivy-compromise-scanner--token $GITHUB_TOKEN --repo owner/repo --output results.json

# Scan multiple repos
trivy-compromise-scanner--token $GITHUB_TOKEN \
  --repo owner/repo1 \
  --repo owner/repo2

# Scan an entire organization, output CSV
trivy-compromise-scanner--token $GITHUB_TOKEN \
  --org myorg \
  --format csv \
  --output results.csv

# Scan with verbose logging and custom time window
trivy-compromise-scanner--token $GITHUB_TOKEN \
  --repo owner/repo \
  --since 2026-03-19T00:00:00Z \
  --until 2026-03-20T23:59:59Z \
  --verbose

Output

Summary Table (always printed to stdout)

SUMMARY
Scanned at:    2026-03-20T12:00:00Z
Repos scanned: 3
Runs scanned:  42
Findings:      1

FINDINGS
REPO              RUN ID      WORKFLOW        TRIGGERED AT                  MATCHES
myorg/my-service  12345678    CI              2026-03-19 18:31:05 +0000 UTC  aquasecurity/trivy-action@abc1234...

JSON Output

{
  "scanned_at": "2026-03-20T12:00:00Z",
  "total_repos": 3,
  "total_runs_scanned": 42,
  "total_findings": 1,
  "findings": [
    {
      "org": "myorg",
      "repo": "myorg/my-service",
      "workflow_name": "CI",
      "run_id": 12345678,
      "run_url": "https://github.com/myorg/my-service/actions/runs/12345678",
      "triggered_at": "2026-03-19 18:31:05 +0000 UTC",
      "matches": [
        {
          "pattern": "aquasecurity/trivy-action@abc1234...",
          "file": "1_Run trivy-action.txt",
          "snippet": "##[group]Run aquasecurity/trivy-action@abc1234...\n  with:"
        }
      ]
    }
  ]
}

CSV Output

org,repo,workflow_name,run_id,run_url,triggered_at,matches
myorg,myorg/my-service,CI,12345678,https://github.com/...,2026-03-19 18:31:05 +0000 UTC,aquasecurity/trivy-action@abc1234...

Updating Compromised Patterns

The list of compromised action references lives in internal/scanner/patterns.go:

var CompromisedActions = map[string][]string{
    // "aquasecurity/trivy-action": {
    //     "abc1234def5678901234567890123456789012345",
    // },
}

Add the confirmed compromised action names and their SHA(s) here. Multiple SHAs per action are supported. The tool will compile these into regexes at startup and match them against log text.

How It Works

1. Enumerate repos — expands --org flags into full repo lists via the GitHub API; merges with explicit --repo targets
2. List workflow runs — queries each repo for runs within the --since/--until window
3. Download logs — fetches the log zip for each run (handles 404 for purged logs gracefully)
4. Match patterns — scans each log file's text for action@sha references matching the compromised patterns
5. Report — outputs a summary table plus JSON or CSV with full match details including surrounding context

Rate Limiting

The scanner respects GitHub API rate limits:

• Retries once after sleeping until reset on RateLimitError or AbuseRateLimitError
• Proactively throttles when fewer than 100 API requests remain

Use --workers to tune concurrency (default: 5). Lower this value if you encounter rate limit issues.

Exit Codes

License

Apache 2.0