{"id":"CVE-2026-123597","aliases":[],"cve":{"records":[{"id":"CVE-2026-123597","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-06T01:00:16.505Z","published":"2026-11-08T01:38:26.431Z","modified":"2026-11-10T17:57:17.487Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-11-08T01:38:26.431Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-10T17:57:17.487Z"}],"references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-xv7c-h5g9-x25x","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-dnssec-validation-cache-poisoning-via-transient-ds-fetch-errors","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-613","description":"Insufficient Session Expiration","source":"VulnCheck"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-10T15:42:02.122839Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Hickory DNS DNSSEC Validation Cache Poisoning via Transient DS-Fetch Errors","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"Hickory DNS hickory-proto 0.25.0-alpha.1 through 0.26.0-alpha.1 and hickory-net before 0.26.2 contain a logic bug in DnssecDnsHandle's DS-fetch path that caches transient DS lookup errors as Bogus DNSSEC validation verdicts. An attacker who induces a SERVFAIL, REFUSED, or timeout response to a child-zone DS sub-query causes the validator to return SERVFAIL for all names under that zone until the cache entry's TTL expires.","score":6.3,"severity":"medium","published":"2026-11-08T01:38:26.431Z","modified":"2026-11-10T17:57:17.487Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"hickory-dns","name":"hickory-dns","platforms":[],"versions":[{"version":"0.25.0-alpha.1","status":"affected","lessThanOrEqual":"0.26.0-alpha.1","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:cargo/hickory-proto","packageIdentity":{"ecosystem":"crates.io","name":"hickory-proto"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-123597"},{"vendor":"hickory-dns","name":"hickory-dns","platforms":[],"versions":[{"version":"0.26.0-beta.1","status":"affected","lessThan":"0.26.2","versionType":"semver"},{"version":"0.26.2","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:cargo/hickory-net","packageIdentity":{"ecosystem":"crates.io","name":"hickory-net"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-123597"}],"remediation":[],"references":["https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-xv7c-h5g9-x25x","https://www.vulncheck.com/advisories/hickory-dns-dnssec-validation-cache-poisoning-via-transient-ds-fetch-errors"],"sources":[{"name":"CVE","id":"CVE-2026-123597","modified":"2026-11-10T17:57:17.487Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-123597"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","score":6.3},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","score":3.7}],"sourceAffected":[],"observedAt":"2026-11-10T18:16:43.604Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T02:45:32.518Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-11-08T02:15:31.281Z","attemptedAt":"2026-11-08T02:15:31.281Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-08T02:15:32.253Z","attemptedAt":"2026-11-08T02:15:32.253Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-11-08T02:15:31.281Z","attemptedAt":"2026-11-08T02:15:31.281Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-08T02:15:32.255Z","attemptedAt":"2026-11-08T02:15:32.255Z"}],"evidence":[],"aiSummary":{"text":"Hickory DNS versions 0.25.0-alpha.1 through 0.26.0-alpha.1 and hickory-net before 0.26.2 contain a logic bug that caches transient DS lookup errors, allowing an attacker to induce a SERVFAIL response. The attacker must have access to induce a SERVFAIL, REFUSED, or timeout response. This causes the validator to return SERVFAIL for all names under that zone until the cache entry's TTL expires.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-08T02:06:49.796Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-123597"}]}}