{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "zeroconf",
        "resource_purl": "pkg:pypi/zeroconf@0.150.0",
        "upstream_fixed_in": "0.149.5"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "airshare",
        "purl": "pkg:brew/airshare"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.1.5"
            },
            {
              "fixed": "0.1.6_23"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/zeroconf@0.150.0",
        "name": "zeroconf",
        "resource": "zeroconf",
        "strategy": "registry",
        "subject_version": "0.150.0"
      }
    ]
  },
  "details": "### Impact\n\n`DNSIncoming._decode_labels_at_offset` recurses once per DNS-name compression pointer (RFC 1035 \u00a74.1.4). Pointer cycles and label counts were capped, but the chain length of unique forward pointers was not. A single ~3 kB mDNS packet carrying ~1500 chained pointers drives the recursion past CPython\u0027s default limit, and `RecursionError` was not listed in `DECODE_EXCEPTIONS`, so it escaped `DNSIncoming.__init__` and was logged by asyncio\u0027s default exception handler.\n\nAny unauthenticated host on the local link (UDP/5353, `224.0.0.251` / `ff02::fb`) can degrade the mDNS listener; that includes a guest on the same Wi-Fi, a compromised IoT device, or a container on a shared bridge. Replaying at a few hertz produces sustained CPU burn and log flooding, and mDNS-dependent features (HomeKit, Chromecast/Matter, AirPlay, printers) degrade while the attack is in flight.\n\n### Patches\nFixed in `zeroconf` 0.149.5 ([PR #1719](https://github.com/python-zeroconf/python-zeroconf/pull/1719)).\nUpgrade to `\u003e= 0.149.5`.\n\n### Workarounds\nThere is no in-process workaround; upgrading is the fix. Otherwise, restrict mDNS (UDP/5353) to trusted Layer-2 segments via AP client isolation, guest-network separation, or host firewall rules.\n\n### Resources\n- [PR #1719](https://github.com/python-zeroconf/python-zeroconf/pull/1719), fix\n- [Issue #1713](https://github.com/python-zeroconf/python-zeroconf/issues/1713), public tracking issue\n- [RFC 1035 \u00a74.1.4](https://www.rfc-editor.org/rfc/rfc1035#section-4.1.4), [RFC 6762](https://www.rfc-editor.org/rfc/rfc6762), [CWE-674](https://cwe.mitre.org/data/definitions/674.html)",
  "id": "BREW-airshare-CVE-2026-47180",
  "modified": "2026-09-17T19:58:50Z",
  "published": "2026-08-13T16:35:13Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-9pgc-3ccv-5297"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/issues/1713"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/pull/1719"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/python-zeroconf/python-zeroconf"
    }
  ],
  "schema_version": "1.7.3",
  "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 has unbounded recursion in DNS compression-pointer decoder that allows LAN-local denial of service",
  "upstream": [
    "GHSA-9pgc-3ccv-5297",
    "CVE-2026-47180",
    "PYSEC-2026-3436"
  ]
}

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "zeroconf",
        "resource_purl": "pkg:pypi/zeroconf@0.151.2",
        "upstream_fixed_in": "0.149.5"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "esphome",
        "purl": "pkg:brew/esphome"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2022.1.2"
            },
            {
              "fixed": "2026.5.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/zeroconf@0.151.2",
        "name": "zeroconf",
        "resource": "zeroconf",
        "strategy": "registry",
        "subject_version": "0.151.2"
      }
    ]
  },
  "details": "### Impact\n\n`DNSIncoming._decode_labels_at_offset` recurses once per DNS-name compression pointer (RFC 1035 \u00a74.1.4). Pointer cycles and label counts were capped, but the chain length of unique forward pointers was not. A single ~3 kB mDNS packet carrying ~1500 chained pointers drives the recursion past CPython\u0027s default limit, and `RecursionError` was not listed in `DECODE_EXCEPTIONS`, so it escaped `DNSIncoming.__init__` and was logged by asyncio\u0027s default exception handler.\n\nAny unauthenticated host on the local link (UDP/5353, `224.0.0.251` / `ff02::fb`) can degrade the mDNS listener; that includes a guest on the same Wi-Fi, a compromised IoT device, or a container on a shared bridge. Replaying at a few hertz produces sustained CPU burn and log flooding, and mDNS-dependent features (HomeKit, Chromecast/Matter, AirPlay, printers) degrade while the attack is in flight.\n\n### Patches\nFixed in `zeroconf` 0.149.5 ([PR #1719](https://github.com/python-zeroconf/python-zeroconf/pull/1719)).\nUpgrade to `\u003e= 0.149.5`.\n\n### Workarounds\nThere is no in-process workaround; upgrading is the fix. Otherwise, restrict mDNS (UDP/5353) to trusted Layer-2 segments via AP client isolation, guest-network separation, or host firewall rules.\n\n### Resources\n- [PR #1719](https://github.com/python-zeroconf/python-zeroconf/pull/1719), fix\n- [Issue #1713](https://github.com/python-zeroconf/python-zeroconf/issues/1713), public tracking issue\n- [RFC 1035 \u00a74.1.4](https://www.rfc-editor.org/rfc/rfc1035#section-4.1.4), [RFC 6762](https://www.rfc-editor.org/rfc/rfc6762), [CWE-674](https://cwe.mitre.org/data/definitions/674.html)",
  "id": "BREW-esphome-CVE-2026-47180",
  "modified": "2026-09-20T10:48:42Z",
  "published": "2026-08-13T16:45:08Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-9pgc-3ccv-5297"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/issues/1713"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/pull/1719"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/python-zeroconf/python-zeroconf"
    }
  ],
  "schema_version": "1.7.3",
  "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 has unbounded recursion in DNS compression-pointer decoder that allows LAN-local denial of service",
  "upstream": [
    "GHSA-9pgc-3ccv-5297",
    "CVE-2026-47180",
    "PYSEC-2026-3436"
  ]
}

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "zeroconf",
        "resource_purl": "pkg:pypi/zeroconf@0.150.0",
        "upstream_fixed_in": "0.149.5"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "homeassistant-cli",
        "purl": "pkg:brew/homeassistant-cli"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.5.0"
            },
            {
              "fixed": "1.0.0_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/zeroconf@0.150.0",
        "name": "zeroconf",
        "resource": "zeroconf",
        "strategy": "registry",
        "subject_version": "0.150.0"
      }
    ]
  },
  "details": "### Impact\n\n`DNSIncoming._decode_labels_at_offset` recurses once per DNS-name compression pointer (RFC 1035 \u00a74.1.4). Pointer cycles and label counts were capped, but the chain length of unique forward pointers was not. A single ~3 kB mDNS packet carrying ~1500 chained pointers drives the recursion past CPython\u0027s default limit, and `RecursionError` was not listed in `DECODE_EXCEPTIONS`, so it escaped `DNSIncoming.__init__` and was logged by asyncio\u0027s default exception handler.\n\nAny unauthenticated host on the local link (UDP/5353, `224.0.0.251` / `ff02::fb`) can degrade the mDNS listener; that includes a guest on the same Wi-Fi, a compromised IoT device, or a container on a shared bridge. Replaying at a few hertz produces sustained CPU burn and log flooding, and mDNS-dependent features (HomeKit, Chromecast/Matter, AirPlay, printers) degrade while the attack is in flight.\n\n### Patches\nFixed in `zeroconf` 0.149.5 ([PR #1719](https://github.com/python-zeroconf/python-zeroconf/pull/1719)).\nUpgrade to `\u003e= 0.149.5`.\n\n### Workarounds\nThere is no in-process workaround; upgrading is the fix. Otherwise, restrict mDNS (UDP/5353) to trusted Layer-2 segments via AP client isolation, guest-network separation, or host firewall rules.\n\n### Resources\n- [PR #1719](https://github.com/python-zeroconf/python-zeroconf/pull/1719), fix\n- [Issue #1713](https://github.com/python-zeroconf/python-zeroconf/issues/1713), public tracking issue\n- [RFC 1035 \u00a74.1.4](https://www.rfc-editor.org/rfc/rfc1035#section-4.1.4), [RFC 6762](https://www.rfc-editor.org/rfc/rfc6762), [CWE-674](https://cwe.mitre.org/data/definitions/674.html)",
  "id": "BREW-homeassistant-cli-CVE-2026-47180",
  "modified": "2026-09-17T17:53:52Z",
  "published": "2026-08-13T16:56:27Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-9pgc-3ccv-5297"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/issues/1713"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/pull/1719"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/python-zeroconf/python-zeroconf"
    }
  ],
  "schema_version": "1.7.3",
  "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 has unbounded recursion in DNS compression-pointer decoder that allows LAN-local denial of service",
  "upstream": [
    "GHSA-9pgc-3ccv-5297",
    "CVE-2026-47180",
    "PYSEC-2026-3436"
  ]
}

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "zeroconf",
        "resource_purl": "pkg:pypi/zeroconf@0.150.0",
        "upstream_fixed_in": "0.149.5"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "isponsorblocktv",
        "purl": "pkg:brew/isponsorblocktv"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.9.0"
            },
            {
              "fixed": "2.10.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/zeroconf@0.150.0",
        "name": "zeroconf",
        "resource": "zeroconf",
        "strategy": "registry",
        "subject_version": "0.150.0"
      }
    ]
  },
  "details": "### Impact\n\n`DNSIncoming._decode_labels_at_offset` recurses once per DNS-name compression pointer (RFC 1035 \u00a74.1.4). Pointer cycles and label counts were capped, but the chain length of unique forward pointers was not. A single ~3 kB mDNS packet carrying ~1500 chained pointers drives the recursion past CPython\u0027s default limit, and `RecursionError` was not listed in `DECODE_EXCEPTIONS`, so it escaped `DNSIncoming.__init__` and was logged by asyncio\u0027s default exception handler.\n\nAny unauthenticated host on the local link (UDP/5353, `224.0.0.251` / `ff02::fb`) can degrade the mDNS listener; that includes a guest on the same Wi-Fi, a compromised IoT device, or a container on a shared bridge. Replaying at a few hertz produces sustained CPU burn and log flooding, and mDNS-dependent features (HomeKit, Chromecast/Matter, AirPlay, printers) degrade while the attack is in flight.\n\n### Patches\nFixed in `zeroconf` 0.149.5 ([PR #1719](https://github.com/python-zeroconf/python-zeroconf/pull/1719)).\nUpgrade to `\u003e= 0.149.5`.\n\n### Workarounds\nThere is no in-process workaround; upgrading is the fix. Otherwise, restrict mDNS (UDP/5353) to trusted Layer-2 segments via AP client isolation, guest-network separation, or host firewall rules.\n\n### Resources\n- [PR #1719](https://github.com/python-zeroconf/python-zeroconf/pull/1719), fix\n- [Issue #1713](https://github.com/python-zeroconf/python-zeroconf/issues/1713), public tracking issue\n- [RFC 1035 \u00a74.1.4](https://www.rfc-editor.org/rfc/rfc1035#section-4.1.4), [RFC 6762](https://www.rfc-editor.org/rfc/rfc6762), [CWE-674](https://cwe.mitre.org/data/definitions/674.html)",
  "id": "BREW-isponsorblocktv-CVE-2026-47180",
  "modified": "2026-09-17T18:42:06Z",
  "published": "2026-08-13T17:00:03Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-9pgc-3ccv-5297"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/issues/1713"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/pull/1719"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/python-zeroconf/python-zeroconf"
    }
  ],
  "schema_version": "1.7.3",
  "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 has unbounded recursion in DNS compression-pointer decoder that allows LAN-local denial of service",
  "upstream": [
    "GHSA-9pgc-3ccv-5297",
    "CVE-2026-47180",
    "PYSEC-2026-3436"
  ]
}

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-47180",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-07-17T19:21:22.892470Z",
                "version": "2.0.3"
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "python-zeroconf",
          "vendor": "python-zeroconf",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.149.5"
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          "value": "Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.5, DNSIncoming._decode_labels_at_offset recurses once per DNS-name compression pointer, and a single mDNS packet carrying chained pointers can trigger a RecursionError that escapes DNSIncoming.__init__, causing sustained CPU burn, log flooding, and degraded mDNS-dependent features for unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb). This issue is fixed in version 0.149.5."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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      "problemTypes": [
        {
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            {
              "cweId": "CWE-674",
              "description": "CWE-674: Uncontrolled Recursion",
              "lang": "en",
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          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-17T18:21:25.199Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      "references": [
        {
          "name": "https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-9pgc-3ccv-5297",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-9pgc-3ccv-5297"
        },
        {
          "name": "https://github.com/python-zeroconf/python-zeroconf/pull/1719",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-zeroconf/python-zeroconf/pull/1719"
        },
        {
          "name": "https://github.com/python-zeroconf/python-zeroconf/commit/f9e23592137f30fdf7ef710dba065da31c79b1cf",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-zeroconf/python-zeroconf/commit/f9e23592137f30fdf7ef710dba065da31c79b1cf"
        },
        {
          "name": "https://github.com/python-zeroconf/python-zeroconf/releases/tag/0.149.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-zeroconf/python-zeroconf/releases/tag/0.149.5"
        }
      ],
      "source": {
        "advisory": "GHSA-9pgc-3ccv-5297",
        "discovery": "UNKNOWN"
      },
      "title": "Zeroconf: Unbounded recursion in DNS compression-pointer decoder allows LAN-local denial of service"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
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    "datePublished": "2026-07-17T18:21:25.199Z",
    "dateReserved": "2026-05-18T22:07:37.434Z",
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "zeroconf"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
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    }
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  "aliases": [
    "CVE-2026-47180"
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  "database_specific": {
    "cwe_ids": [
      "CWE-674"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-29T20:09:52Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\n\n`DNSIncoming._decode_labels_at_offset` recurses once per DNS-name compression pointer (RFC 1035 \u00a74.1.4). Pointer cycles and label counts were capped, but the chain length of unique forward pointers was not. A single ~3 kB mDNS packet carrying ~1500 chained pointers drives the recursion past CPython\u0027s default limit, and `RecursionError` was not listed in `DECODE_EXCEPTIONS`, so it escaped `DNSIncoming.__init__` and was logged by asyncio\u0027s default exception handler.\n\nAny unauthenticated host on the local link (UDP/5353, `224.0.0.251` / `ff02::fb`) can degrade the mDNS listener; that includes a guest on the same Wi-Fi, a compromised IoT device, or a container on a shared bridge. Replaying at a few hertz produces sustained CPU burn and log flooding, and mDNS-dependent features (HomeKit, Chromecast/Matter, AirPlay, printers) degrade while the attack is in flight.\n\n### Patches\nFixed in `zeroconf` 0.149.5 ([PR #1719](https://github.com/python-zeroconf/python-zeroconf/pull/1719)).\nUpgrade to `\u003e= 0.149.5`.\n\n### Workarounds\nThere is no in-process workaround; upgrading is the fix. Otherwise, restrict mDNS (UDP/5353) to trusted Layer-2 segments via AP client isolation, guest-network separation, or host firewall rules.\n\n### Resources\n- [PR #1719](https://github.com/python-zeroconf/python-zeroconf/pull/1719), fix\n- [Issue #1713](https://github.com/python-zeroconf/python-zeroconf/issues/1713), public tracking issue\n- [RFC 1035 \u00a74.1.4](https://www.rfc-editor.org/rfc/rfc1035#section-4.1.4), [RFC 6762](https://www.rfc-editor.org/rfc/rfc6762), [CWE-674](https://cwe.mitre.org/data/definitions/674.html)",
  "id": "GHSA-9pgc-3ccv-5297",
  "modified": "2026-05-29T20:09:52Z",
  "published": "2026-05-29T20:09:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-9pgc-3ccv-5297"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/issues/1713"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-zeroconf/python-zeroconf/pull/1719"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/python-zeroconf/python-zeroconf"
    }
  ],
  "schema_version": "1.4.0",
  "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 has unbounded recursion in DNS compression-pointer decoder that allows LAN-local denial of service"
}