{"identifier":"CVE-2026-81736","cve":{"id":"CVE-2026-81736","description":"If a BIND resolver has cached a tree of SVCB/HTTPS AliasMode records, and is then queried for the root of that tree, the resolver will spend disproportionate CPU time constructing the response.\nThis issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.","published":"2026-09-16T14:17:10.817000+00:00","modified":"2026-10-26T21:10:00.170000+00:00","status":"Awaiting Analysis","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_version":"3.1","affected":[],"weaknesses":["CWE-1050"],"references":[{"url":"https://downloads.isc.org/isc/bind9/9.20.29","source":"security-officer@isc.org"},{"url":"https://downloads.isc.org/isc/bind9/9.21.26","source":"security-officer@isc.org"},{"url":"https://kb.isc.org/docs/cve-2026-81736","source":"security-officer@isc.org"}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"security-officer@isc.org","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-17T18:45:52.174550Z","id":"CVE-2026-81736","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[],"source":"nvd","retrieved_at":"2026-10-28T10:26:00.979115+00:00","exploited":false,"kev_stale":false,"products":[],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence."]},"epss":{"probability":0.00569,"percentile":0.46983,"date":"2026-10-28","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"downloads.isc.org","source_url":"https://downloads.isc.org/isc/bind9/9.20.29","investigate_url":"https://investigate.aeglixmind.com/#downloads.isc.org"},{"domain":"kb.isc.org","source_url":"https://kb.isc.org/docs/cve-2026-81736","investigate_url":"https://investigate.aeglixmind.com/#kb.isc.org"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-81736","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-81736","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-81736","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}