CVE-2026-123607
Published:November 08, 2026
Updated:November 09, 2026
Hickory DNS hickory-proto 0.25.0-alpha.3 through 0.25.2 and hickory-net before 0.26.1 contain an unbounded loop vulnerability in DnssecDnsHandle NSEC3 closest-encloser proof validation when the SOA owner is not an ancestor of the QNAME. Upstream attackers can return NoData or NXDomain responses with a cross-zone SOA record to panic debug builds or exhaust memory in release builds.
Affected Packages
https://github.com/hickory-dns/hickory-dns.git (GITHUB):
Affected version(s) >=v0.25.0-alpha.3 <v0.26.1 || >=v0.26.0-alpha.1 <v0.26.1Fix Suggestion:
Update to version v0.26.1hickory-net (RUST):
Affected version(s) >=0.26.0-beta.1 <0.26.1Fix Suggestion:
Update to version 0.26.1hickory-proto (RUST):
Affected version(s) =0.26.0-alpha.1 <0.26.1 || >=0.25.0-alpha.3 <0.26.1Fix Suggestion:
Update to version 0.26.1Related Resources (10)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Loop with Unreachable Exit Condition
EPSS
Base Score:
0.34