{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2026.2.3"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9c640fe0fa008d6e80aa4cc88c9c1734605fb3e0"
            }
          ],
          "repo": "https://github.com/home-assistant/core",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-4ghv-53cq-7wp3"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91129.json"
  },
  "details": "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.",
  "id": "CVE-2026-91129",
  "modified": "2026-09-23T03:30:27.607595923Z",
  "published": "2026-09-22T19:05:15.559Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91129.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/home-assistant/core/commit/0f3c7ca2772b605c0f3c09c88f35e527ea6ea560"
    },
    {
      "type": "FIX",
      "url": "https://github.com/home-assistant/core/commit/815c708d19aa0c7f59f9ee318b613a5e481a42b3"
    },
    {
      "type": "FIX",
      "url": "https://github.com/home-assistant/core/pull/162941"
    },
    {
      "type": "WEB",
      "url": "https://github.com/home-assistant/core/releases/tag/2026.2.3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/home-assistant/core/security/advisories/GHSA-4ghv-53cq-7wp3"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91129"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Home Assistant: mDNS Server-Side Request Forgery"
}