In NLnet Labs Unbound 1.7.0 up to and including 1.25.1, when an auth/rpz zone has a configured primary hostname that resolves to BOGUS A/AAAA, it is still considered as a possible XFR endpoint. A malicious actor that can spoof the hostname's A/AAAA record (no valid RRSIG required) becomes the zone's XFR primary and can replaces the entire zone/the resolver's entire response policy.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade unbound | Jul 29, 2026 | Jul 22, 2026 |
| Amazon_linux_2023 | — | Upgrade unbound-libs-debuginfoUpgrade python3-unbound-debuginfoUpgrade unbound-debugsourceUpgrade unbound-debuginfoUpgrade unbound-anchor-debuginfoUpgrade unbound-utils-debuginfoUpgrade unbound-anchorUpgrade python3-unboundUpgrade unbound-develUpgrade unbound-libsUpgrade unboundUpgrade unbound-utils | Aug 10, 2026 | Jul 22, 2026 |
| Debian | — | Upgrade unbound | Sep 21, 2026 | Jul 22, 2026 |
| Freebsd | — | Upgrade unbound | Jul 28, 2026 | Jul 25, 2026 |
| Redhat_linux | — | No solution exists | Aug 19, 2026 | Jul 22, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 10, 2026 | Jul 22, 2026 |
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