CVE-2026-47703

AdGuard Home: DoQ-to-UDP State Reduction and Source-Port Oracle

Published Jul 15, 2026 CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-xgx4-4h9w-53pv AdGuard Home: DoQ-to-UDP State Reduction and Source-Port Oracle
History
Type Values Removed Values Added
First Time appeared Adguard
Adguard adguardhome
Vendors & Products Adguard
Adguard adguardhome
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title AdGuard Home: DoQ-to-UDP State Reduction and Source-Port Oracle
Weaknesses CWE-330
CWE-346
References
Metrics cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jul 15, 2026, 5:45 PM
Reserved
May 19, 2026, 9:18 PM
Status
Analyzed
Published
Jul 15, 2026, 5:16 PM
Modified
Oct 24, 2026, 9:10 PM