{"id":"CVE-2026-91129","state":"PUBLISHED","title":"Home Assistant: mDNS Server-Side Request Forgery","description":"Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.2.3, the IPP integration automatically processed unauthenticated _ipp._tcp.local mDNS announcements in homeassistant/components/ipp/config_flow.py, where async_step_zeroconf passed attacker-controlled host, port, and base_path values to validate_input for printer metadata retrieval. Because the shared HTTP client followed attacker-controlled cross-origin redirects without blocking loopback targets, a local-network attacker could redirect the request to 127.0.0.1 or another internal service without user interaction or prior IPP configuration. This issue is fixed in version 2026.2.3.","publishedAt":"2026-09-22T19:05:15.559Z","updatedAt":"2026-09-24T15:25:00.416Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["home-assistant core"],"affected":[{"vendor":"home-assistant","product":"core","versions":[{"version":"< 2026.2.3","status":"affected"}]}],"references":["https://github.com/home-assistant/core/security/advisories/GHSA-4ghv-53cq-7wp3","https://github.com/home-assistant/core/pull/162941","https://github.com/home-assistant/core/commit/0f3c7ca2772b605c0f3c09c88f35e527ea6ea560","https://github.com/home-assistant/core/commit/815c708d19aa0c7f59f9ee318b613a5e481a42b3","https://github.com/home-assistant/core/releases/tag/2026.2.3"],"weaknesses":["CWE-918"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/91xxx/CVE-2026-91129.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-91129","state":"PUBLISHED","datePublished":"2026-09-22T19:05:15.559Z","dateUpdated":"2026-09-24T15:25:00.416Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-14T19:36:48.844Z"},"containers":{"cna":{"title":"Home Assistant: mDNS Server-Side Request Forgery","descriptions":[{"lang":"en","value":"Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.2.3, the IPP integration automatically processed unauthenticated _ipp._tcp.local mDNS announcements in homeassistant/components/ipp/config_flow.py, where async_step_zeroconf passed attacker-controlled host, port, and base_path values to validate_input for printer metadata retrieval. Because the shared HTTP client followed attacker-controlled cross-origin redirects without blocking loopback targets, a local-network attacker could redirect the request to 127.0.0.1 or another internal service without user interaction or prior IPP configuration. This issue is fixed in version 2026.2.3."}],"affected":[{"vendor":"home-assistant","product":"core","versions":[{"version":"< 2026.2.3","status":"affected"}]}],"references":[{"url":"https://github.com/home-assistant/core/security/advisories/GHSA-4ghv-53cq-7wp3","name":"https://github.com/home-assistant/core/security/advisories/GHSA-4ghv-53cq-7wp3","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/home-assistant/core/pull/162941","name":"https://github.com/home-assistant/core/pull/162941","tags":["x_refsource_MISC"]},{"url":"https://github.com/home-assistant/core/commit/0f3c7ca2772b605c0f3c09c88f35e527ea6ea560","name":"https://github.com/home-assistant/core/commit/0f3c7ca2772b605c0f3c09c88f35e527ea6ea560","tags":["x_refsource_MISC"]},{"url":"https://github.com/home-assistant/core/commit/815c708d19aa0c7f59f9ee318b613a5e481a42b3","name":"https://github.com/home-assistant/core/commit/815c708d19aa0c7f59f9ee318b613a5e481a42b3","tags":["x_refsource_MISC"]},{"url":"https://github.com/home-assistant/core/releases/tag/2026.2.3","name":"https://github.com/home-assistant/core/releases/tag/2026.2.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-22T19:05:15.559Z"},"source":{"advisory":"GHSA-4ghv-53cq-7wp3","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/home-assistant/core/security/advisories/GHSA-4ghv-53cq-7wp3","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-24T15:24:54.228110Z","id":"CVE-2026-91129","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-24T15:25:00.416Z"}}]}}}