{"id":"UBUNTU-CVE-2026-123582","details":"The validating recursive resolver and validating forwarder in Hickory DNS (hickory-server) 0.25.0 before 0.26.2 do not check whether the SOA record passed DNSSEC validation when assembling NXDOMAIN or NODATA responses. An attacker able to supply forged DNS responses can have a forged SOA record returned to clients with the AD bit set, misleading clients that rely on the server's DNSSEC validation.","modified":"2026-11-10T02:50:21.785072983Z","published":"2026-11-09T00:00:00Z","upstream":["CVE-2026-123582"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-123582"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-123582"},{"type":"REPORT","url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-8hq4-5836-w6q4"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/hickory-dns-0.25.0-before-0.26.2-dnssec-validation-bypass-via-soa-record"}],"affected":[{"package":{"name":"rust-hickory-server","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/rust-hickory-server?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.24.4-2","0.26.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-hickory-server-dev","binary_version":"0.26.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123582.json"}},{"package":{"name":"rust-hickory-server","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/rust-hickory-server?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.24.4-2"],"ecosystem_specific":{"binaries":[{"binary_version":"0.24.4-2","binary_name":"librust-hickory-server-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123582.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}