Information Disclosure in homeassistant (CVE-2026-54317)
Summary
Vulnerability in homeassistant (CVE-2026-54317). Confidential information can be exposed externally. Exploitable via Authorization header. Mitigation: upgrade to 2026.6.0 or later.
Original description
The description as published by the source.
Home Assistant is open source home automation software that puts local control and privacy first. Prior to 2026.6.0, the Konnected integration registers an HTTP endpoint, KonnectedView (homeassistant/components/konnected/init.py), that is marked as not requiring authentication (requires_auth = False). A comment next to that line says auth is instead handled "via the access token from configuration." That promise is only half true. Write requests (POST and PUT) are handled by update_sensor(), which does check the request's Authorization: Bearer header against the integration's stored access tokens (using hmac.compare_digest). Read requests (GET) are handled by a separate get() method that has no authentication check at all. This vulnerability is fixed in 2026.6.0.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-54317 has been found in homeassistant.
Attackers can target a specific entry point like Authorization header over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.6/10.
What to do: upgrade homeassistant to 2026.6.0 or later.
If unsure, ask your IT team or search "homeassistant CVE-2026-54317" on the vendor's site.
CVE-2026-54317 (homeassistant) — CWE-200 / CVSS v3 7.6
Attack vector: adjacent-network / unauthenticated / no user interaction
Attack surface: Authorization header / KonnectedView / hmac.compare_digest / device_id
Patched: 2026.6.0 — apply immediately
Workaround: Migrate to the EspHome integration, as suggested in the existing repair issue for the Konnected integration.
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.
Information disclosure (CWE-200) exists in homeassistant. Attackers reach the vulnerable code path via Authorization header without authentication.
Check the vendor advisory for the affected versions of homeassistant. Attack surface: Authorization header / KonnectedView / hmac.compare_digest / device_id.
Severity: High (CVSS 7.6/10). Confidential information can be exposed externally.
Update to 2026.6.0.
Workaround: Migrate to the EspHome integration, as suggested in the existing repair issue for the Konnected integration.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'homeassistant' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'homeassistant' . | 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
homeassistantを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply temporary workaround mitigate
Migrate to the EspHome integration, as suggested in the existing repair issue for the Konnected integration.パッチが適用されるまでの応急処置として、Migrate to the EspHome integration, as suggested in the existing repair issue for the Konnected integration. 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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3Apply patch patch
Upgrade homeassistant to 2026.6.0ステージング環境で 2026.6.0 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を含めること。
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4Post-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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- web github.com
- web github.com