{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "1.9.0"
              },
              {
                "fixed": "1.9.12"
              },
              {
                "introduced": "2.0.0"
              },
              {
                "fixed": "2.0.3"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "298a9d67fb760a12eabe89164f92fb814572aea8"
            },
            {
              "fixed": "0189ba2d45e4089e96ac7cf20107b53c3d950c18"
            },
            {
              "introduced": "89747e81bc60d7950276d5fda3ca669fa81b7cf9"
            },
            {
              "fixed": "4108ae9f5f169166dba3e7f386be570304dfa224"
            }
          ],
          "repo": "https://github.com/powerdns/pdns",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "OX",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27854.json"
  },
  "details": "An attacker might be able to trigger a use-after-free by sending crafted DNS queries to a DNSdist using the DNSQuestion:getEDNSOptions method in custom Lua code. In some cases DNSQuestion:getEDNSOptions might refer to a version of the DNS packet that has been modified, thus triggering a use-after-free and potentially a crash resulting in denial of service.",
  "id": "CVE-2026-27854",
  "modified": "2026-07-15T01:49:19.162107375Z",
  "published": "2026-03-31T12:06:46.648Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://repo.powerdns.com/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27854.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27854"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/PowerDNS/pdns"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Use after free when parsing EDNS options in Lua"
}