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

Summary This report covers the client-triggered DoQ forwarding path in: - dnsproxy v0.81.2 adguard/dnsproxy:v0.81.2 - AdGuard Home v0.107.74 adguard/adguardhome:latest, image version label v0.107.74 The issue was reproduced on 2026-04-25 with the products configured through their documented DoQ...

GHSA-XGX4-4H9W-53PV AdGuard Home: DoQ-to-UDP State Reduction and Source-Port Oracle

Summary This report covers the client-triggered DoQ forwarding path in: - dnsproxy v0.81.2 adguard/dnsproxy:v0.81.2 - AdGuard Home v0.107.74 adguard/adguardhome:latest, image version label v0.107.74 The issue was reproduced on 2026-04-25 with the products configured through their documented DoQ...

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

This report covers the client-triggered DoQ forwarding path in: - dnsproxy v0.81.2 adguard/dnsproxy:v0.81.2 - AdGuard Home v0.107.74 adguard/adguardhome:latest, image version label v0.107.74 The issue was reproduced on 2026-04-25 with the products configured through their documented DoQ listener...

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

This report covers the client-triggered DoQ forwarding path in: - dnsproxy v0.81.2 adguard/dnsproxy:v0.81.2 - AdGuard Home v0.107.74 adguard/adguardhome:latest, image version label v0.107.74 The issue was reproduced on 2026-04-25 with the products configured through their documented DoQ listener...

PT-2026-46871

Summary This report covers the client-triggered DoQ forwarding path in: - dnsproxy v0.81.2 adguard/dnsproxy:v0.81.2 - AdGuard Home v0.107.74 adguard/adguardhome:latest, image version label v0.107.74 The issue was reproduced on 2026-04-25 with the products configured through their documented DoQ...

PT-2026-46882

Name of the Vulnerable Software and Affected Versions dnsproxy version 0.81.2 AdGuard Home version 0.107.74 Description A state reduction issue exists in the client-triggered DNS over QUIC DoQ forwarding path when queries are forwarded to a UDP upstream. In this path, the backend DNS ID transacti...

Exploit for Improper Authentication in Adguard Adguardhome

CVE-2026-32136exploit - AdGuard Home h2c Upgrade Auth Bypass...

CVE-2026-32136

AdGuard Home is a network-wide software for blocking ads and tracking. Prior to 0.107.73, an unauthenticated remote attacker can bypass all authentication in AdGuardHome by sending an HTTP/1.1 request that requests an upgrade to HTTP/2 cleartext h2c. Once the upgrade is accepted, the resulting...

SUSE CVE-2026-32136

AdGuard Home is a network-wide software for blocking ads and tracking. Prior to 0.107.73, an unauthenticated remote attacker can bypass all authentication in AdGuardHome by sending an HTTP/1.1 request that requests an upgrade to HTTP/2 cleartext h2c. Once the upgrade is accepted, the resulting...

GO-2026-4686 AdGuard Home: HTTP/2 Cleartext (h2c) Upgrade Authentication Bypass in github.com/AdguardTeam/AdGuardHome

AdGuard Home: HTTP/2 Cleartext h2c Upgrade Authentication Bypass in github.com/AdguardTeam/AdGuardHome...

EUVD-2026-11416

AdGuard Home: HTTP/2 Cleartext h2c Upgrade Authentication Bypass...

GHSA-5FG6-WRQ4-W5GH AdGuard Home: HTTP/2 Cleartext (h2c) Upgrade Authentication Bypass

VULNERABILITY: HTTP/2 Cleartext h2c Upgrade Authentication Bypass ======================================================================== Severity: CRITICAL CVSS 3.1: 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CWE: CWE-287 Improper Authentication Component: internal/home/web.go Affected:...

AdGuard Home: HTTP/2 Cleartext (h2c) Upgrade Authentication Bypass

VULNERABILITY: HTTP/2 Cleartext h2c Upgrade Authentication Bypass ======================================================================== Severity: CRITICAL CVSS 3.1: 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CWE: CWE-287 Improper Authentication Component: internal/home/web.go Affected:...

AdGuard Home: HTTP/2 Cleartext (h2c) Upgrade Authentication Bypass

An unauthenticated remote attacker can bypass all authentication in AdGuardHome by sending an HTTP/1.1 request that requests an upgrade to HTTP/2 cleartext h2c. Once the upgrade is accepted, the resulting HTTP/2 connection is handled by the inner mux, which has no authentication middleware...

CVE-2026-32136

AdGuard Home is a network-wide software for blocking ads and tracking. Prior to 0.107.73, an unauthenticated remote attacker can bypass all authentication in AdGuardHome by sending an HTTP/1.1 request that requests an upgrade to HTTP/2 cleartext h2c. Once the upgrade is accepted, the resulting...

CVE-2026-32136 AdGuard Home: HTTP/2 Cleartext (h2c) Upgrade Authentication Bypass

AdGuard Home is a network-wide software for blocking ads and tracking. Prior to 0.107.73, an unauthenticated remote attacker can bypass all authentication in AdGuardHome by sending an HTTP/1.1 request that requests an upgrade to HTTP/2 cleartext h2c. Once the upgrade is accepted, the resulting...

CVE-2026-32136

AdGuard Home is a network-wide software for blocking ads and tracking. Prior to 0.107.73, an unauthenticated remote attacker can bypass all authentication in AdGuardHome by sending an HTTP/1.1 request that requests an upgrade to HTTP/2 cleartext h2c. Once the upgrade is accepted, the resulting...

CVE-2026-32136 AdGuard Home: HTTP/2 Cleartext (h2c) Upgrade Authentication Bypass

AdGuard Home is a network-wide software for blocking ads and tracking. Prior to 0.107.73, an unauthenticated remote attacker can bypass all authentication in AdGuardHome by sending an HTTP/1.1 request that requests an upgrade to HTTP/2 cleartext h2c. Once the upgrade is accepted, the resulting...

CVE-2026-32136 AdGuard Home: HTTP/2 Cleartext (h2c) Upgrade Authentication Bypass

AdGuard Home is a network-wide software for blocking ads and tracking. Prior to 0.107.73, an unauthenticated remote attacker can bypass all authentication in AdGuardHome by sending an HTTP/1.1 request that requests an upgrade to HTTP/2 cleartext h2c. Once the upgrade is accepted, the resulting...

CVE-2026-32136

AdGuard Home (network-wide ad/blocking software) contains a authentication bypass vulnerability CVE-2026-32136. Before 0.107.73, an unauthenticated remote attacker can trigger an HTTP/1.1 upgrade to h2c; after the upgrade is accepted, the inner mux handles subsequent HTTP/2 requests without authe...