CVE-2026-47703

MediumCVSS 5.3/10Last modified Oct 24, 2026

Description

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness enumeration

CWE-330 CWE-346

Affected software

Vendor	Product	Versions
AdguardTeam	AdGuardHome	< 0.107.75

References

https://github.com/AdguardTeam/AdGuardHome/security/advisories/GHSA-xgx4-4h9w-53pvExploit, Vendor Advisory
https://github.com/AdguardTeam/AdGuardHome/security/advisories/GHSA-xgx4-4h9w-53pvExploit, Vendor Advisory

Timeline

Published: Jul 15, 2026
Last modified: Oct 24, 2026
NVD status: Analyzed

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