CVE-2026-47703 — AdGuard Home: DoQ-to-UDP State Reduction and Source-Port Oracle
AdGuard Home is a network-wide software for blocking ads and tracking. Prior to 0.107.75, AdGuard Home's client-triggered DoQ forwarding path to a udp:// upstream reduced backen…
Published: 2026-07-15 · CVSS: 6.3 · CVSS 4.0
AdGuard Home is a network-wide software for blocking ads and tracking. Prior to 0.107.75, AdGuard Home's client-triggered DoQ forwarding path to a udp:// upstream reduced backend UDP DNS state by producing dns_id=0 or txid=0 and exposed a quoted-port ICMP source-port oracle, weakening DNS response matching for forwarded queries. This issue is fixed in version 0.107.75.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7