CVE-2026-13321

Name of the Vulnerable Software and Affected Versions BIND 9 versions 9.11.0 through 9.18.50 BIND 9 versions 9.20.0 through 9.20.24 BIND 9 versions 9.21.0 through 9.21.23 BIND 9 versions 9.11.3-S1 through 9.18.50-S1 BIND 9 versions 9.20.9-S1 through 9.20.24-S1

Description The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the signer's zone, potentially leading to a DNSSEC validation bypass.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.