{"id":"CVE-2026-34205","state":"PUBLISHED","title":"Home Assistant: Unauthenticated App (Add-on) Endpoints Exposed to Local Network via Host Network Mode","description":"Home Assistant is open source home automation software that puts local control and privacy first. Home Assistant apps (formerly add-ons) configured with host network mode expose unauthenticated endpoints bound to the internal Docker bridge interface to the local network. On Linux, this configuration does not restrict access to the app as intended, allowing any device on the same network to reach these endpoints without authentication. Home Assistant Supervisor 2026.03.02 addresses the issue.","publishedAt":"2026-03-27T19:41:10.707Z","updatedAt":"2026-04-01T03:55:28.161Z","severity":{"score":9.7,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["home-assistant Home Assistant Operating System","home-assistant Home Assistant Supervisor"],"affected":[{"vendor":"home-assistant","product":"Home Assistant Operating System","versions":[{"version":"<= 17.1","status":"affected"}]},{"vendor":"home-assistant","product":"Home Assistant Supervisor","versions":[{"version":"< 2026.03.2","status":"affected"}]}],"references":["https://github.com/home-assistant/core/security/advisories/GHSA-gh5m-4m97-c95h"],"weaknesses":["CWE-923"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/34xxx/CVE-2026-34205.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34205","state":"PUBLISHED","datePublished":"2026-03-27T19:41:10.707Z","dateUpdated":"2026-04-01T03:55:28.161Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-26T15:57:52.323Z"},"containers":{"cna":{"title":"Home Assistant: Unauthenticated App (Add-on) Endpoints Exposed to Local Network via Host Network Mode","descriptions":[{"lang":"en","value":"Home Assistant is open source home automation software that puts local control and privacy first. Home Assistant apps (formerly add-ons) configured with host network mode expose unauthenticated endpoints bound to the internal Docker bridge interface to the local network. On Linux, this configuration does not restrict access to the app as intended, allowing any device on the same network to reach these endpoints without authentication. Home Assistant Supervisor 2026.03.02 addresses the issue."}],"affected":[{"vendor":"home-assistant","product":"Home Assistant Operating System","versions":[{"version":"<= 17.1","status":"affected"}]},{"vendor":"home-assistant","product":"Home Assistant Supervisor","versions":[{"version":"< 2026.03.2","status":"affected"}]}],"references":[{"url":"https://github.com/home-assistant/core/security/advisories/GHSA-gh5m-4m97-c95h","name":"https://github.com/home-assistant/core/security/advisories/GHSA-gh5m-4m97-c95h","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":9.7,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-923","lang":"en","description":"CWE-923: Improper Restriction of Communication Channel to Intended Endpoints","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-27T19:41:10.707Z"},"source":{"advisory":"GHSA-gh5m-4m97-c95h","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-31T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-34205"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-01T03:55:28.161Z"}}]}}}