What is CVE-2026-123579?

CVE-2026-123579 is a low-severity vulnerability in Hickory-Dns, classified under CWE-358. CVSS score: 3.7/10. Published 2026-11-08.

How severe is CVE-2026-123579?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Hickory-Dns

CVE-2026-123579

DNSSEC validation in Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 does not distinguish NODATA responses from wildcard-expanded positive responses. For a query that should return NODATA in a zone with wildcard records, an attacker can combine an NSEC3 record matching the query name with a signed wildcard record into a bogus positive response that validation accepts.

Published 2026-11-08.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/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-358

References

GitHub Security Advisory (GHSA-vrv5-968r-5ggm) (vendor-advisory)
VulnCheck Advisory: Hickory DNS 0.26.0-beta.1 before 0.26.2 DNSSEC Validation Bypass via Wildcard Expansion (third-party-advisory)

Frequently asked questions

What is CVE-2026-123579?: CVE-2026-123579 is a low-severity vulnerability in Hickory-Dns, classified under CWE-358. CVSS score: 3.7/10. Published 2026-11-08.
How severe is CVE-2026-123579?: Low severity. CVSS v3 base score is 3.7 out of 10.