{"affected":[{"defaultStatus":"unaffected","ecosystem":"cargo","packageName":"hickory-proto","product":"hickory-dns","source":"CNA: VulnCheck","vendor":"hickory-dns","versions":[{"lessThanOrEqual":"0.26.0-alpha.1","status":"affected","version":"0.25.0-alpha.1","versionType":"semver"}]},{"defaultStatus":"unaffected","ecosystem":"cargo","packageName":"hickory-net","product":"hickory-dns","source":"CNA: VulnCheck","vendor":"hickory-dns","versions":[{"lessThan":"0.26.2","status":"affected","version":"0.26.0-beta.1","versionType":"semver"},{"status":"unaffected","version":"0.26.2","versionType":"semver"}]}],"cveId":"CVE-2026-123597","cwes":["CWE-613"],"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":6.3,"severity":"medium","source":"CNA: 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","version":"4.0"},{"score":3.7,"severity":"low","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}],"modifiedAt":1794101906431,"publishedAt":1794101906431,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-xv7c-h5g9-x25x"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/hickory-dns-dnssec-validation-cache-poisoning-via-transient-ds-fetch-errors"}],"remediation":[],"revision":"662624dd110eba7e3c94332ee7656875bf429fd34a0c6cecbd8185e96a828084","sources":[{"modifiedAt":1794101906431,"name":"CNA: VulnCheck","retrievedAt":1794103834362,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123597"}],"ssvc":null,"status":"published","title":"Hickory DNS DNSSEC Validation Cache Poisoning via Transient DS-Fetch Errors","updatedAt":1794103834362}