CVE-2026-123590 PUBLISHED

Hickory DNS 0.26.0-beta.1 before 0.26.2 Improper NSEC/NSEC3 Signature Validation

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

Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 accept NSEC and NSEC3 records for DNSSEC nonexistence proofs when any other record with the same owner name passes signature validation. Attackers able to supply DNS responses can mix validly signed records with bogus same-name NSEC or NSEC3 records of different types in the authority section to forge nonexistence proofs.

Metrics

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

Product Status

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
Vendor hickory-dns
Product hickory-dns
Versions Default: unaffected
  • affected from 0 to 0.26.0-alpha.1 (incl.)

Credits

  • qifan-sailboat reporter

References

Problem Types

  • Improper Verification of Cryptographic Signature CWE