VDB
CVE-2026-32136
CVE-2026-32136
PUBLISHED
CVSS 9.800000190734863 CRITICAL
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.
EPSS 0.90% · 76.0th percentile
Risk Scores
CVSS v3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.90%
76.0th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| AdguardTeam | AdGuardHome | < 0.107.73, < 0.107.73, < 0.107.73 |
| github.com | AdguardTeam/AdGuardHome | 0, 0, 0 |
| adguard | adguardhome | 0, 0, 0 |
Timeline
- Mar 11, 2026 CVE Published
- Mar 12, 2026 EPSS Score
- Mar 12, 2026 PoC Published
- Mar 12, 2026 CVE Updated
- Mar 12, 2026 PoC Published
- Mar 13, 2026 EPSS Score
- Mar 14, 2026 EPSS Score
- Mar 15, 2026 EPSS Score
- Mar 16, 2026 EPSS Score
- Mar 17, 2026 EPSS Score
- Mar 17, 2026 Coalition ESS Score
- Mar 17, 2026 Security Advisory