CVE-2026-13321

The CVE relates to BIND DNSSEC validation: the resolver accepts validly-signed NSEC records whose Next Domain Name points outside the signer's zone, enabling potential DNSSEC validation bypass. Affected are BIND 9 releases across multiple series: 9.11.0–9.18.50, 9.20.0–9.20.24, 9.21.0–9.21.23, an...

CVE-2026-13321 DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field

The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the signer's zone. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1...