CVE-2026-123599 PUBLISHED

Hickory DNS before 0.26.0-beta.1 DNSSEC Validation Bypass via Non-IN Class Records

Assigner: VulnCheck
Reserved: 06.11.2026 Published: 08.11.2026 Updated: 08.11.2026

Hickory DNS hickory-proto before 0.26.0-beta.1 and hickory-net before 0.26.2 contain a DNSSEC validation bypass because verify_rrsets() ignores DNS class when partitioning RRsets, so non-IN records skip signature verification yet are marked secure when the IN records verify. Attackers able to supply DNS responses can include forged CH or HS class records, including DS records, to authenticate any DNSKEY and forge child zone responses.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 6.3

Product Status

Vendor hickory-dns
Product hickory-dns
Versions Default: unaffected
  • affected from 0 to 0.26.0-beta.1 (excl.)
  • Version 0.26.0-beta.1 is unaffected
Vendor hickory-dns
Product hickory-dns
Versions Default: unaffected
  • affected from 0.26.0-beta.1 to 0.26.2 (excl.)
  • Version 0.26.2 is unaffected

Credits

  • qifan-sailboat reporter

References

Problem Types

  • Insufficient Verification of Data Authenticity CWE