{"id":"CVE-2026-42387","aliases":["ALPINE-CVE-2026-42387","DEBIAN-CVE-2026-42387","EUVD-2026-39357","GHSA-9v36-5rhx-cq6m","UBUNTU-CVE-2026-42387"],"status":"published","title":"Insufficient input validation in ZoneToCache","description":"A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00483,"percentile":0.42114,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2026-06-25T12:59:16Z","modified":"2026-11-03T06:33:03Z","fixes":[{"ecosystem":"Alpine:v3.24","package":"pdns-recursor","fixed_in":["5.4.3-r0"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"pdns-recursor","fixed_in":["5.2.11-0+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"pdns-recursor","fixed_in":["5.4.3-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.24","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.3-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.4-1","4.8.6-1","4.8.7-1","4.8.8-1","4.8.8-1+deb12u1","4.9.0-1","4.9.0-2","4.9.1-1","4.9.1-2","4.9.1-3","4.9.1-4","4.9.2-1","4.9.2-2","4.9.3-1","4.9.4-1","4.9.5-1","5.0.5-1","5.0.7-1","5.0.7-2","5.0.9-1","5.1.3-1","5.1.3-2","5.2.0-1","5.2.0-2","5.2.0-3","5.2.0-4","5.2.0-5","5.2.1-1","5.2.2-1","5.2.2-2","5.2.4-1","5.2.4-2","5.2.5-1","5.3.0-1","5.3.0-2","5.3.0-3","5.3.0-4","5.3.0-5","5.3.1-1","5.3.3-1","5.3.4-1","5.3.4-2","5.3.5-1","5.4.0-1","5.4.1-1","5.4.1-2","5.4.2-1","5.4.2-2","5.4.3-1","5.4.4-1","5.4.5-1","5.4.6-1","5.4.6-2","5.4.8-1"]},{"source":"osv","ecosystem":"Debian:13","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.2.11-0+deb13u1"}]}],"versions":["5.2.4-2","5.2.4-2+deb13u1","5.2.5-1","5.2.6-0+deb13u1","5.2.7-0+deb13u1","5.2.8-0+deb13u1","5.2.9-0+deb13u1"]},{"source":"osv","ecosystem":"Debian:14","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.3-1"}]}],"versions":["5.2.4-2","5.2.5-1","5.3.0-1","5.3.0-2","5.3.0-3","5.3.0-4","5.3.0-5","5.3.1-1","5.3.3-1","5.3.4-1","5.3.4-2","5.3.5-1","5.4.0-1","5.4.1-1","5.4.1-2","5.4.2-1","5.4.2-2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.3-1","4.0.0~alpha1-1","4.0.0~alpha1-2","4.0.0~alpha2-2","4.0.0~alpha2-2ubuntu0.1","4.0.0~alpha2-2ubuntu0.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.0.6-1","4.0.6-1build1","4.0.7-1","4.1.1-1","4.1.1-1build1","4.1.1-2","4.1.1-2ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.0-6","4.2.1-1","4.2.1-1build1","4.2.1-1build2","4.2.1-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.2-3","4.6.0-1ubuntu1","4.6.0-1ubuntu1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.9.0-2","4.9.1-4","4.9.2-1","4.9.2-1build1","4.9.2-2","4.9.3-1","4.9.3-1build2","4.9.3-1build3"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.0-5","5.2.2-1","5.2.2-2","5.2.4-2","5.2.4-2build2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.5-1","5.4.3-1","5.4.5-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.4-2build2","5.3.1-1","5.3.3-1","5.3.4-1","5.3.4-1build1","5.3.4-2","5.3.5-1"]}],"products":[{"vendor":"powerdns","product":"recursor"}],"references":[{"url":"https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-08.html","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42387","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-9v36-5rhx-cq6m"},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-42387","tags":["advisory"]},{"url":"https://repo.powerdns.com/","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42387.json","tags":["advisory"]},{"url":"https://github.com/PowerDNS/pdns","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-42387","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-42387","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-42387","tags":["report"]},{"url":"https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-08.html#cve-2026-42387-insufficient-input-validation-in-zonetocache","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-42387","title":"Insufficient input validation in ZoneToCache","description":"A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.","status":"published","published":"2026-06-25T12:59:16.813Z","modified":"2026-06-25T14:41:46.92Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T13:40:23.731501Z"}],"euvd":[{"id":"EUVD-2026-39357","description":"A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.","status":"published","published":"2026-06-25T12:59:16Z","modified":"2026-06-25T14:41:46Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T18:20:25.700423Z"}],"ghsa":[{"id":"GHSA-9v36-5rhx-cq6m","title":"A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads...","description":"A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.","status":"published","published":"2026-06-25T15:32:00Z","modified":"2026-06-25T18:30:36Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:08:59.328511Z"}],"nvd":[{"id":"CVE-2026-42387","description":"A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.","status":"published","published":"2026-06-25T14:16:39.447Z","modified":"2026-10-25T23:10:00.167Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:12:26.045561Z"}],"osv":[{"id":"ALPINE-CVE-2026-42387","description":"A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.","status":"published","published":"2026-06-25T14:16:39.447Z","modified":"2026-11-03T06:33:03.10728687Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T07:15:53.944853Z"},{"id":"CVE-2026-42387","title":"Insufficient input validation in ZoneToCache","description":"A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.","status":"published","published":"2026-06-25T12:59:16.813Z","modified":"2026-10-28T11:13:10.315953663Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:04.117819Z"},{"id":"DEBIAN-CVE-2026-42387","description":"A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.","status":"published","published":"2026-06-25T14:16:39.447Z","modified":"2026-10-26T12:01:09.859592067Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:54.892385Z"},{"id":"UBUNTU-CVE-2026-42387","description":"A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.","status":"published","published":"2026-06-25T14:16:00Z","modified":"2026-10-17T13:00:04.682376107Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:18.393417Z"}]}}