{"schemaVersion":3,"id":"CVE-2026-13321","aliases":["ALPINE-CVE-2026-13321","UBUNTU-CVE-2026-13321","DEBIAN-CVE-2026-13321"],"status":"published","duplicateOf":null,"title":null,"description":"The BIND resolver accepts validly-signed NSEC records where the \"Next Domain Name\" field points outside the signer's zone.\nThis issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 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1:9.20.26-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"bind9","name":"bind9","label":"bind9","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/bind9","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 1:9.9.5.dfsg-3ubuntu0.19+esm15","noFixRecorded":false,"fixedIn":null},{"text":"< 1:9.10.3.dfsg.P4-8ubuntu1.19+esm11","noFixRecorded":false,"fixedIn":null},{"text":"< 1:9.11.3+dfsg-1ubuntu1.19+esm6","noFixRecorded":false,"fixedIn":null},{"text":"< 1:9.18.30-0ubuntu0.20.04.2+esm3","noFixRecorded":false,"fixedIn":null},{"text":"< 1:9.18.39-0ubuntu0.22.04.5","noFixRecorded":false,"fixedIn":null},{"text":"< 1:9.18.39-0ubuntu0.24.04.6","noFixRecorded":false,"fixedIn":null},{"text":"< 1:9.20.24-1ubuntu0.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 1:9.9.5.dfsg-3ubuntu0.19+esm15 | < 1:9.10.3.dfsg.P4-8ubuntu1.19+esm11 | < 1:9.11.3+dfsg-1ubuntu1.19+esm6 | < 1:9.18.30-0ubuntu0.20.04.2+esm3 | < 1:9.18.39-0ubuntu0.22.04.5 | < 1:9.18.39-0ubuntu0.24.04.6 | < 1:9.20.24-1ubuntu0.2","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"bind9-libs","name":"bind9-libs","label":"bind9-libs","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/bind9-libs","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"isc-dhcp","name":"isc-dhcp","label":"isc-dhcp","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/isc-dhcp","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"isc-dhcp","label":"ISC DHCP","category":"server-app"}},"hubHref":null},{"vendor":"isc","product":"bind 9","name":"BIND 9","label":"bind 9","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 9.11.0, ≤ 9.18.50","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.20.0, ≤ 9.20.24","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.21.0, ≤ 9.21.23","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.11.3-S1, ≤ 9.18.50-S1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.20.9-S1, ≤ 9.20.24-S1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 9.11.0, ≤ 9.18.50 | ≥ 9.20.0, ≤ 9.20.24 | ≥ 9.21.0, ≤ 9.21.23 | ≥ 9.11.3-S1, ≤ 9.18.50-S1 | ≥ 9.20.9-S1, ≤ 9.20.24-S1","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"bind-9","label":"BIND 9","category":"server-app"}},"hubHref":"/vendor/isc/bind_9"}],"affectedCount":6,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://kb.isc.org/docs/cve-2026-13321","label":"kb.isc.org/docs/cve-2026-13321","hostname":"kb.isc.org","tags":["Vendor 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