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CVE-2026-54318
high
CVSS 7.1
Vulnerability in home-assistant (CVE-2026-54318)
Summary
vulnerability in home-assistant (CVE-2026-54318). Data can be tampered with by attackers. Mitigation: upgrade to `2026.5.3` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-54318** has been found in home-assistant.
Data can be tampered with by attackers. CVSS score: 7.1/10.
What to do: upgrade home-assistant to **2026.5.3** or later.
If unsure, ask your IT team or search "home-assistant CVE-2026-54318" on the vendor's site.
CVE-2026-54318 (home-assistant) — CWE-926 / CVSS v3 7.1
Attack vector: local / unauthenticated / no user interaction
Patched: `2026.5.3` — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**A vulnerability** (CWE-926) exists in home-assistant.
📍 Affected scope
home-assistant — .
🔥 Severity
Severity: High (CVSS 7.1/10). Data can be tampered with by attackers
🔧 How to fix
Update to **2026.5.3**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'home-assistant' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
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 'home-assistant' . | 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 `home-assistant` 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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6Apply patch patch
Upgrade home-assistant to 2026.5.3ステージング環境で 2026.5.3 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。
References
- exploit 134c704f-9b21-4f2e-91b3-4a467353bcc0
- patch [email protected]