CVE-2026-123590

medium

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.

References

https://www.vulncheck.com/advisories/hickory-dns-0.26.0-beta.1-before-0.26.2-improper-nsec-nsec3-signature-validation

https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-57pw-897j-v4j6

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-119349

Details

Source: Mitre, NVD

Published: 2026-11-08

Updated: 2026-11-09

Risk Information

CVSS v2

Base Score: 4

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 4.8

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

Severity: Medium

CVSS v4

Base Score: 6.3

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

Severity: Medium

EPSS

EPSS: 0.00158