GHSA-fg2p-gxqh-hm83MediumCVSS 4.8
Hickory DNS hickory-proto through 0.26.0-alpha.1 and hickory-net 0.26.0-beta.1 before 0.26.2...
🔗 CVE IDs covered (1)
📋 Description
Hickory DNS hickory-proto through 0.26.0-alpha.1 and hickory-net 0.26.0-beta.1 before 0.26.2 contain an NSEC validation flaw that returns a secure proof for NXDOMAIN responses when the covering NSEC's Next Domain Name is a strict descendant of the query name, which actually proves the name exists as an empty non-terminal. On-path attackers can flip the unsigned rcode of a genuine signed NODATA response from NOERROR to NXDOMAIN, causing validators to accept forged nonexistence of the name.
🔗 References (4)
- https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-86vr-jm6c-7cpg
- https://nvd.nist.gov/vuln/detail/CVE-2026-123594
- https://www.vulncheck.com/advisories/hickory-dns-through-0.26.0-alpha.1-dnssec-nsec-validation-bypass-for-empty-non-terminals
- https://github.com/advisories/GHSA-fg2p-gxqh-hm83