Vulnerability Details 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 HTTP/2 connection is handled by the inner mux, which has no authentication middleware attached. All subsequent HTTP/2 requests on that connection are processed as fully authenticated, regardless of whether any credentials were provided. This vulnerability is fixed in 0.107.73.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 38.1%
CVSS Severity
CVSS v3 Score 9.8
Products affected by CVE-2026-32136
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cpe:2.3:a:adguard:adguardhome:0.1
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cpe:2.3:a:adguard:adguardhome:0.100.0
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cpe:2.3:a:adguard:adguardhome:0.100.1
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cpe:2.3:a:adguard:adguardhome:0.100.2
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cpe:2.3:a:adguard:adguardhome:0.100.3
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cpe:2.3:a:adguard:adguardhome:0.100.4
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cpe:2.3:a:adguard:adguardhome:0.100.5
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cpe:2.3:a:adguard:adguardhome:0.100.6
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cpe:2.3:a:adguard:adguardhome:0.100.7
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cpe:2.3:a:adguard:adguardhome:0.100.8
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cpe:2.3:a:adguard:adguardhome:0.100.9
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cpe:2.3:a:adguard:adguardhome:0.101.0
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cpe:2.3:a:adguard:adguardhome:0.102.0
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cpe:2.3:a:adguard:adguardhome:0.103.0
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cpe:2.3:a:adguard:adguardhome:0.103.1
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cpe:2.3:a:adguard:adguardhome:0.103.2
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cpe:2.3:a:adguard:adguardhome:0.103.3
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cpe:2.3:a:adguard:adguardhome:0.104.0
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cpe:2.3:a:adguard:adguardhome:0.104.1
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cpe:2.3:a:adguard:adguardhome:0.104.2
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cpe:2.3:a:adguard:adguardhome:0.104.3
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cpe:2.3:a:adguard:adguardhome:0.105.0
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cpe:2.3:a:adguard:adguardhome:0.105.1
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cpe:2.3:a:adguard:adguardhome:0.105.2
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cpe:2.3:a:adguard:adguardhome:0.106.0
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cpe:2.3:a:adguard:adguardhome:0.106.1
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cpe:2.3:a:adguard:adguardhome:0.106.2
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cpe:2.3:a:adguard:adguardhome:0.106.3
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cpe:2.3:a:adguard:adguardhome:0.107.0
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cpe:2.3:a:adguard:adguardhome:0.107.1
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cpe:2.3:a:adguard:adguardhome:0.107.10
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cpe:2.3:a:adguard:adguardhome:0.107.11
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cpe:2.3:a:adguard:adguardhome:0.107.12
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cpe:2.3:a:adguard:adguardhome:0.107.13
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cpe:2.3:a:adguard:adguardhome:0.107.14
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cpe:2.3:a:adguard:adguardhome:0.107.15
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cpe:2.3:a:adguard:adguardhome:0.107.16
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cpe:2.3:a:adguard:adguardhome:0.107.2
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cpe:2.3:a:adguard:adguardhome:0.107.3
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cpe:2.3:a:adguard:adguardhome:0.107.4
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cpe:2.3:a:adguard:adguardhome:0.107.5
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cpe:2.3:a:adguard:adguardhome:0.107.6
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cpe:2.3:a:adguard:adguardhome:0.107.7
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cpe:2.3:a:adguard:adguardhome:0.107.8
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cpe:2.3:a:adguard:adguardhome:0.107.9
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cpe:2.3:a:adguard:adguardhome:0.9
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cpe:2.3:a:adguard:adguardhome:0.91
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cpe:2.3:a:adguard:adguardhome:0.92
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cpe:2.3:a:adguard:adguardhome:0.93
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cpe:2.3:a:adguard:adguardhome:0.94
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cpe:2.3:a:adguard:adguardhome:0.95
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cpe:2.3:a:adguard:adguardhome:0.96
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cpe:2.3:a:adguard:adguardhome:0.97.0
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cpe:2.3:a:adguard:adguardhome:0.97.1
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cpe:2.3:a:adguard:adguardhome:0.98.0
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cpe:2.3:a:adguard:adguardhome:0.98.1
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cpe:2.3:a:adguard:adguardhome:0.99.0
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cpe:2.3:a:adguard:adguardhome:0.99.1
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cpe:2.3:a:adguard:adguardhome:0.99.2
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cpe:2.3:a:adguard:adguardhome:0.99.3