Vulnerability DatabaseCVE-2026-123581
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CVE-2026-123581
Published:November 08, 2026
Updated:November 09, 2026
Hickory DNS hickory-proto through 0.26.0-alpha.1 and hickory-net 0.26.0-beta.1 before 0.26.2 contain a DNSSEC validation flaw that accepts a response as a positive answer when any valid RRset appears in the answer section, without checking that the RRset is responsive to the query. Attackers can supply signed but unrelated RRsets so that responses lacking matching records are validated as positive answers instead of as no-data responses.
Affected Packages
https://github.com/hickory-dns/hickory-dns.git (GITHUB):
Affected version(s) >=0.5.0 <v0.26.2 || =0.6.0 <v0.26.2 || >=0.7.0 <v0.26.2 || >=0.8.0 <v0.26.2 || >=0.9.0 <v0.26.2 || >=0.10.0 <v0.26.2 || =0.11.0 <v0.26.2 || =c0.12.0 <v0.26.2 || =resolver.0.4.0 <v0.26.2 || >=r0.5.0 <v0.26.2 || =r0.7.0 <v0.26.2 || >=r0.8.0 <v0.26.2 || >=r0.9.0 <v0.26.2 || >=r0.10.0 <v0.26.2 || >=r0.11 <v0.26.2 || =r0.12_cs0.17 <v0.26.2 || =v0.13.0 <v0.26.2 || =v0.14.0 <v0.26.2 || =cs0.15.0 <v0.26.2 || >=cs0.16 <v0.26.2 || >=0.18.0.alpha.2 <v0.26.2 || >=0.19.0 <v0.26.2 || =v0.19.7 <v0.26.2 || >=v0.20.0-alpha.1 <v0.26.2 || >=v0.21.0-alpha.1 <v0.26.2 || >=v0.22.0 <v0.26.2 || >=v0.23.0-alpha.1 <v0.26.2 || >=v0.24.0 <v0.26.2 || >=v0.25.0-alpha.1 <v0.26.2 || >=v0.26.0-alpha.1 <v0.26.2
Fix Suggestion:
Update to version v0.26.2
hickory-proto (RUST):
Affected version(s) =0.26.0-alpha.1 <0.26.2 || >=0.24.0 <0.26.2 || >=0.25.0-alpha.1 <0.26.2
Fix Suggestion:
Update to version 0.26.2
hickory-net (RUST):
Affected version(s) >=0.26.0-beta.1 <0.26.2
Fix Suggestion:
Update to version 0.26.2
Related Resources (4)
https://www.vulncheck.com/advisories/hickory-dns-through-0.26.0-alpha.1-dnssec-validation-bypass-via-unrelated-rrset
https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-929p-gjf6-5hqj
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123581.json
https://nvd.nist.gov/vuln/detail/CVE-2026-123581
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CVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Insufficient Verification of Data Authenticity
CWE-345
EPSS
Base Score:
0.13