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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 wheth
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5c897bfc9764ad03cc36d116a8da53f7c3b0a3ea2037718b31ce7625188ffbae
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"AdGuardHome","vendor":"AdguardTeam","versions":[{"status":"affected","version":"< 0.107.73"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6e22e2dcc4fd5f4efc5f6a306e66b64bd66a99cfd6faef77f3bda17527e81be4 · sha256:a27031750eebca86… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6e22e2dcc4fd5f4efc5f6a306e66b64bd66a99cfd6faef77f3bda17527e81be4 · sha256:a27031750eebca86… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6e22e2dcc4fd5f4efc5f6a306e66b64bd66a99cfd6faef77f3bda17527e81be4 · sha256:a27031750eebca86… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/AdguardTeam/AdGuardHome/security/advisories/GHSA-5fg6-wrq4-w5gh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/AdguardTeam/AdGuardHome/security/advisories/GHSA-5fg6-wrq4-w5gh"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6e22e2dcc4fd5f4efc5f6a306e66b64bd66a99cfd6faef77f3bda17527e81be4 · sha256:a27031750eebca86… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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