CVE-2026-123590
Hickory DNS 0.26.0-beta.1 before 0.26.2 Improper NSEC/NSEC3 Signature Validation
CVSS Score
4.8
EPSS Score
0.0%
EPSS Percentile
0th
Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 accept NSEC and NSEC3 records for DNSSEC nonexistence proofs when any other record with the same owner name passes signature validation. Attackers able to supply DNS responses can mix validly signed records with bogus same-name NSEC or NSEC3 records of different types in the authority section to forge nonexistence proofs.
| CWE | CWE-347 |
| Vendor | hickory-dns |
| Product | hickory-dns |
| Published | Nov 8, 2026 |
Stay Ahead of the Next One
Get instant alerts for hickory-dns hickory-dns
Be the first to know when new medium vulnerabilities affecting hickory-dns hickory-dns are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
Affected Versions
hickory-dns / hickory-dns
0.26.0-beta.1 < 0.26.2
hickory-dns / hickory-dns
0 ≤ 0.26.0-alpha.1
References
Credits
🔍 qifan-sailboat