VDB
DEBIAN-CVE-2026-27588
DEBIAN-CVE-2026-27588
PUBLISHED
CVSS 9.100000381469727 CRITICAL
Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's HTTP `host` request matcher is documented as case-insensitive, but when configured with a large host list (>100 entries) it becomes case-sensitive due to an optimized matching path. An attacker can bypass host-based routing and any access controls attached to that route by changing the casing of the `Host` header. Version 2.11.1 contains a fix for the issue.
Risk Scores
CVSS 3.1
9.100000381469727
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | caddy | 0, 2.11.2-1, 2.6.2-13 |
| Debian:14 | caddy | 0, 2.6.2-12, 2.6.2-13 |
| Debian:12 | caddy | 0, 2.11.2-1, 2.6.2-10 |
Timeline
- Feb 24, 2026 CVE Published
- Apr 30, 2026 CVE Updated