MEDIUM 6.3 NVD
CVE-2026-123597
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
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.
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-tra
This medium severity vulnerability with a CVSS score of 6.3 was published on 2026-11-08 via NVD.
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