CVE-2026-50248 — BOGUS configured primary hostname accepted for XFR in auth/rpz zones
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 possib…
Published: 2026-07-22 · CVSS: 6.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7