h2csmuggler

h2cSmuggler Description h2cSmuggler smuggles HTTP traffic past insecure edge-server proxypass configurations by establishing HTTP/2 cleartext h2c communications with h2c-compatible back-end servers, allowing a bypass of proxy rules and access controls. See my detailed write-up below for: Technica...

CVE-2026-32136_exploit

CVE-2026-32136exploit - AdGuard Home h2c Upgrade Auth Bypass Unauthenticated authentication bypass in AdGuard Home 0.107.73 via HTTP/2 cleartext h2c upgrade. | ---|--- CVE| CVE-2026-32136 CVSS| 9.8 Critical — AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CWE| CWE-287 Improper Authentication Affected| AdGua...

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...

CVE-2026-32136: Improper Authentication

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...