CVE-2026-123587

CVSS 8.9 (high) · published 2026-11-08

The DNSSEC validation in the Hickory DNS hickory-net crate 0.26.0 before 0.26.2 identifies wraparound NSEC records by comparing the next domain name to an SOA record in the response, accepting that SOA even if it fails validation. Attackers who can supply DNS responses can combine a genuine NSEC record and its RRSIG with a crafted SOA record to forge nonexistence of any RRset.

Weakness: CWE-290

Source: NVD CVE-2026-123587

References

• https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-qw83-5pm2-ggp5
• https://www.vulncheck.com/advisories/hickory-dns-0.26.0-before-0.26.2-dnssec-nonexistence-forgery-via-wraparound-nsec

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