CVE-2026-123602
Hickory DNS Recursor Ghost Domain Attack via Child-Side NS RRset Caching
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
The Hickory DNS recursor in all versions of hickory-recursor and in hickory-resolver 0.26.0-beta.1 before 0.26.2 (recursor feature) is vulnerable to ghost domain names attacks because it reuses child-side apex NS RRsets cached from zone NS queries for iterative resolution. By repeatedly querying a zone's NS records, an attacker keeps the stale RRset cached indefinitely, letting name servers whose delegation the parent revoked keep answering for the zone.
| CWE | CWE-672 |
| Vendor | hickory-dns |
| Product | hickory-dns |
| Published | Nov 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
hickory-dns / hickory-dns
0 ≤ 0.26.0-alpha.1
hickory-dns / hickory-dns
0.26.0-beta.1 < 0.26.2
References
Credits
🔍 qifan-sailboat