CVE-2026-32136

{"id": "CVE-2026-32136", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2026-03-11T22:16:33.423", "references": [{"url": "https://github.com/AdguardTeam/AdGuardHome/security/advisories/GHSA-5fg6-wrq4-w5gh", "tags": ["Exploit", "Vendor Advisory", "Mitigation"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-287"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "AdGuard Home es un software a nivel de red para bloquear anuncios y rastreo. Antes de la versi\u00f3n 0.107.73, un atacante remoto no autenticado puede eludir toda la autenticaci\u00f3n en AdGuardHome enviando una solicitud HTTP/1.1 que solicita una actualizaci\u00f3n a HTTP/2 en texto claro (h2c). Una vez que se acepta la actualizaci\u00f3n, la conexi\u00f3n HTTP/2 resultante es manejada por el multiplexor interno, que no tiene ning\u00fan middleware de autenticaci\u00f3n adjunto. Todas las solicitudes HTTP/2 posteriores en esa conexi\u00f3n se procesan como completamente autenticadas, independientemente de si se proporcionaron credenciales. Esta vulnerabilidad se corrige en la versi\u00f3n 0.107.73."}], "lastModified": "2026-03-13T20:19:00.987", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:adguard:adguardhome:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "045CAB9C-0942-408F-BEE0-0600E5922070", "versionEndExcluding": "0.107.73"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}