CVE-2026-123597

LowCVSS 3.7/10Last modified Nov 10, 2026

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.

Metrics

CVSS 3.1 3.7/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness enumeration

CWE-613

Affected software

Vendor	Product	Versions
hickory-dns	hickory-dns	>= 0.25.0-alpha.1, <= 0.26.0-alpha.1
hickory-dns	hickory-dns	>= 0.26.0-beta.1, < 0.26.2

References

Timeline

Published: Nov 8, 2026
Last modified: Nov 10, 2026
NVD status: Deferred

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