High severity8.6NVD Advisory· Published Jul 22, 2026· Updated Jul 22, 2026
CVE-2026-13321
CVE-2026-13321
Description
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.
Affected products
39- osv-coords38 versionspkg:rpm/almalinux/bindpkg:rpm/almalinux/bind-chrootpkg:rpm/almalinux/bind-develpkg:rpm/almalinux/bind-dnssec-docpkg:rpm/almalinux/bind-dnssec-utilspkg:rpm/almalinux/bind-docpkg:rpm/almalinux/bind-export-develpkg:rpm/almalinux/bind-export-libspkg:rpm/almalinux/bind-libspkg:rpm/almalinux/bind-libs-litepkg:rpm/almalinux/bind-licensepkg:rpm/almalinux/bind-lite-develpkg:rpm/almalinux/bind-pkcs11pkg:rpm/almalinux/bind-pkcs11-develpkg:rpm/almalinux/bind-pkcs11-libspkg:rpm/almalinux/bind-pkcs11-utilspkg:rpm/almalinux/bind-sdbpkg:rpm/almalinux/bind-sdb-chrootpkg:rpm/almalinux/bind-utilspkg:rpm/almalinux/bind9.16pkg:rpm/almalinux/bind9.16-chrootpkg:rpm/almalinux/bind9.16-develpkg:rpm/almalinux/bind9.16-dnssec-utilspkg:rpm/almalinux/bind9.16-docpkg:rpm/almalinux/bind9.16-libspkg:rpm/almalinux/bind9.16-licensepkg:rpm/almalinux/bind9.16-utilspkg:rpm/almalinux/bind9.18pkg:rpm/almalinux/bind9.18-chrootpkg:rpm/almalinux/bind9.18-develpkg:rpm/almalinux/bind9.18-dnssec-utilspkg:rpm/almalinux/bind9.18-docpkg:rpm/almalinux/bind9.18-libspkg:rpm/almalinux/bind9.18-utilspkg:rpm/almalinux/python3-bindpkg:rpm/almalinux/python3-bind9.16pkg:rpm/opensuse/bind&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/bind&distro=openSUSE%20Tumbleweed
< 32:9.16.23-40.el9_8.8+ 37 more
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 9.20.26-160000.1.1
- (no CPE)range: < 9.20.26-1.1
Patches
Vulnerability mechanics
References
3News mentions
1- ISC BIND 9: Nine DNSSEC and Response Handling Flaws Disclosed TogetherVypr Intelligence · Jul 23, 2026