{"id":"CVE-2026-42389","summary":"Reject more queries with invalid header values","details":"This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.","modified":"2026-07-08T08:13:17.585139841Z","published":"2026-06-25T13:16:45.245Z","database_specific":{"cna_assigner":"OX","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42389.json"},"references":[{"type":"WEB","url":"https://repo.powerdns.com/"},{"type":"ADVISORY","url":"https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-08.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42389.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42389"},{"type":"PACKAGE","url":"https://github.com/PowerDNS/pdns"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/powerdns/pdns","events":[{"introduced":"c95adbda8ce519923dfdbe7947d82a2692e18af9"},{"fixed":"9f875a6231f22b189c3f03a3c97a910079c47115"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"5.4.0"},{"fixed":"5.4.3"}]}}],"versions":["rec-5.4.2","rec-5.4.0-rc1","rec-5.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42389.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}