{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "82c58cc45435ddd77875daf368cf64398bc15966"
            }
          ],
          "repo": "https://github.com/pi-hole/ftl",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "certcc",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2291.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "2.92rel2"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.",
  "id": "CVE-2026-2291",
  "modified": "2026-07-08T05:36:15.039882207Z",
  "published": "2026-05-11T16:47:01.981Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pi-hole/FTL/releases/tag/v6.6.2"
    },
    {
      "type": "WEB",
      "url": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html"
    },
    {
      "type": "WEB",
      "url": "https://thekelleys.org.uk/dnsmasq/CVE/"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/471747"
    },
    {
      "type": "WEB",
      "url": "https://www.suse.com/security/cve/CVE-2026-2291.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2291.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2291"
    },
    {
      "type": "FIX",
      "url": "https://github.com/NixOS/nixpkgs/pull/519082"
    },
    {
      "type": "FIX",
      "url": "https://github.com/NixOS/nixpkgs/pull/519093"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "CVE-2026-2291"
}