What is CVE-2026-123581?

CVE-2026-123581 is a medium-severity vulnerability in Hickory-Dns, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.3/10. Published 2026-11-08.

How severe is CVE-2026-123581?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Hickory-Dns

CVE-2026-123581

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.

Published 2026-11-08.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Hickory-Dns

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

github.com/hickory-dns/hickory-dns/security/advisories/GHSA-929p-gjf6-5hqj (vendor-advisory)
www.vulncheck.com/advisories/hickory-dns-through-0.26.0-alpha.1-dnssec-validati… (third-party-advisory)

Frequently asked questions

What is CVE-2026-123581?: CVE-2026-123581 is a medium-severity vulnerability in Hickory-Dns, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.3/10. Published 2026-11-08.
How severe is CVE-2026-123581?: Medium severity. CVSS v3 base score is 5.3 out of 10.