Vulnerability in Hickory-Dns
CVE-2026-123605
Hickory DNS hickory-proto 0.1 through 0.25.0-alpha.3 and hickory-net before 0.26.2 contain a DNSSEC validation bypass because the validator verifies an RRSIG against the DNSKEY of whatever name appears in its Signer's Name field without checking that this name is the zone containing the RRset. Attackers controlling any secure zone can produce valid signatures over arbitrary records in unrelated zones, which resolvers, recursors, and clients using DnssecDnsHandle accept as authenticated.
Published .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
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
Weakness classification (CWE)
References
- github.com/hickory-dns/hickory-dns/security/advisories/GHSA-2vgh-3wfw-qj7c (vendor-advisory)
- www.vulncheck.com/advisories/hickory-dns-through-0.25.0-alpha.3-dnssec-validati… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-123605?
- CVE-2026-123605 is a high-severity vulnerability in Hickory-Dns, classified under Improper Verification of Cryptographic Signature. CVSS score: 8.8/10. Published 2026-11-08.
- How severe is CVE-2026-123605?
- High severity. CVSS v3 base score is 8.8 out of 10.