CVE-2026-123580hickory-dns hickory-dns
NVD
Vulnerability Summary
Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 perform insufficient checks on NSEC3 record names during DNSSEC verification, comparing only the hashed label without confirming the record belongs to the correct zone. Attackers can supply NSEC3 records from another zone with a matching hash label to forge DNSSEC nonexistence proofs.
CVSS v4.0 Base Metrics — Score 8.7 (HIGH)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:NAttack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)None
Integrity (Vulnerable System)High
Availability (Vulnerable System)None
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)None
Show CVSS v3.x metrics (score 7.5)
CVSS v3.1 Base Metrics — Score 7.5 (HIGH)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NAttack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityNone
Affected & Patched Versions
- hickory-dns hickory-dns >= 0.26.0-beta.1 and < 0.26.2
- hickory-dns hickory-dns <= 0.26.0-alpha.1
- hickory-dns hickory-dns 0.26.2
- hickory-dns hickory-dns 0.26.0-alpha.1
What to do
Plan remediation soon. No exploitation is confirmed yet, but the severity is high.
- Check whether you run hickory-dns hickory-dns and which version.
- Update to a patched version listed above, then confirm the new version.
Timeline
- Nov 8, 2026Published
- Nov 12, 2026Record last modified
Score, severity and exploitation changes are tracked from the day Watchtower started logging them.
Get notified about new hickory-dns hickory-dns CVEsYou are reading CVE-2026-123580. Get an email when KEV listings, exploits or new CVEs match your stack.
Set up CVE alertsExternal References
Data last checked: Nov 14, 2026 02:13 UTC