{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.149.7"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0ad3f37b5b852b8f614d322283d148efb2cef6e4"
            },
            {
              "fixed": "e32f52d69d838ec1d2e97856a786691eaa6a4632"
            }
          ],
          "repo": "https://github.com/python-zeroconf/python-zeroconf",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-rfg2-pjw2-56x2"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47184.json"
  },
  "details": "Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.7, DNSCache._async_add inserted every response record into cache, _expirations, _expire_heap, and service_cache without a cap, allowing unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb) to multicast valid mDNS responses with unique names and cause memory exhaustion, slower cache lookups, slower async_expire passes, and broken discovery, registration, and ServiceBrowser callbacks. This issue is fixed in version 0.149.7.",
  "id": "CVE-2026-47184",
  "modified": "2026-07-19T03:31:18.187755830Z",
  "published": "2026-07-17T18:25:07.387Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/releases/tag/0.149.7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47184.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-rfg2-pjw2-56x2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47184"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/python-zeroconf/python-zeroconf/issues/1715"
    },
    {
      "type": "FIX",
      "url": "https://github.com/python-zeroconf/python-zeroconf/commit/0ad3f37b5b852b8f614d322283d148efb2cef6e4"
    },
    {
      "type": "FIX",
      "url": "https://github.com/python-zeroconf/python-zeroconf/pull/1718"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Zeroconf: Unbounded DNS record cache allows LAN-local memory exhaustion via multicast flood"
}