CVE-2026-32136 details a critical authentication bypass vulnerability affecting AdGuard Home versions prior to 0.107.73. An unauthenticated remote attacker can exploit this by requesting an HTTP/2 cleartext (h2c) upgrade, which allows all subsequent HTTP/2 requests on that connection to be processed as fully authenticated. This flaw carries a CVSS score of 9.8 (Critical) due to its potential for complete compromise of confidentiality, integrity, and availability. Despite its severity, there is currently no evidence of active exploitation, public exploit code, or significant community attention for this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.107.73CPE matchmatch criteria | cpe:2.3:a:adguard:adguardhome:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.