CVE-2026-123590

Public on 2026-11-08
Modified on 2026-11-12
Description
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.
Severity
Medium severity
Medium
See what this means
CVSS v3 Base Score
4.8
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2023 aardvark-dns Not Affected
Amazon Linux 2027 Preview aardvark-dns Not Affected
Amazon Linux 2 - Aws-nitro-enclaves-cli Extra aws-nitro-enclaves-cli Not Affected
Amazon Linux 2023 aws-nitro-enclaves-cli Not Affected
Amazon Linux 2027 Preview aws-nitro-enclaves-cli Not Affected

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-123590 Mitre: CVE-2026-123590