What is GHSA-6fg5-mp7g-rgj8?

GHSA-6fg5-mp7g-rgj8 is a security advisory published by GitHub Security Advisories with High severity. Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 fail...

Which CVE IDs does GHSA-6fg5-mp7g-rgj8 cover?

GHSA-6fg5-mp7g-rgj8 covers the following CVE IDs: CVE-2026-123591. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-6fg5-mp7g-rgj8?

GHSA-6fg5-mp7g-rgj8 has a CVSS v3 base score of 5.9, published by GitHub Security Advisories.

GHSA-6fg5-mp7g-rgj8HighCVSS 5.9

Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 fail...

Vendor

GitHub Security Advisories

Published

November 8, 2026

Last Modified

November 8, 2026

🔗 CVE IDs covered (1)

CVE-2026-123591 →

📋 Description

Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 fail to verify, per RFC 6840 §4.4, that an NSEC or NSEC3 record denying a DS RRset also proves the delegation's NS record exists. Attackers can reuse child-side NSEC or NSEC3 records to fake an insecure delegation and forge child-zone records.

🔗 References (4)

https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-7php-9j59-g3ch
https://nvd.nist.gov/vuln/detail/CVE-2026-123591
https://www.vulncheck.com/advisories/hickory-dns-0.26.0-beta.1-before-0.26.2-dnssec-validation-bypass-via-missing-rfc-6840-checks
https://github.com/advisories/GHSA-6fg5-mp7g-rgj8