Vulnerability in github.com/fleetdm/fleet (CVE-2026-46356)
Summary
vulnerability in github.com/fleetdm/fleet (CVE-2026-46356). Data can be tampered with by attackers. Mitigation: upgrade to `4.80.1` or later.
AI summary snake-internal / snake-material-v2
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'github.com/fleetdm/fleet' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `github.com/fleetdm/fleet` を grep し、稼働しているサービス・バージョンを把握する。
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5Apply temporary workaround mitigate
If an immediate upgrade is not possible, administrators should ensure Fleet is deployed behind a reverse proxy (e.g., nginx, Cloudflare, AWS ALB) that overwrites `X-Forwarded-For` with the true client IP, and apply rate limiting at the proxy or WAF lパッチが適用されるまでの応急処置として、If an immediate upgrade is not possible, administrators should ensure Fleet is deployed behind a reverse proxy (e.g., nginx, Cloudflare, AWS ALB) that overwrites `X-Forwarded-For` with the true client IP, and apply rate limiting at the proxy or WAF l を実施。回避策の副作用 (機能低下) を確認した上で。
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6Apply patch patch
Upgrade github.com/fleetdm/fleet to 4.80.1ステージング環境で 4.80.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 3 で見つけた異常検知の続報チェックを含めること。
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7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。