Caddy: MatchHost becomes case-sensitive for large host lists (>100), enabling host-based route/auth bypass
概要
Caddy: MatchHost becomes case-sensitive for large host lists (>100), enabling host-based route/auth bypass
原文の説明
取得元が公開している説明をそのまま載せています (多くは英語)。
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.
出典: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
ディストリビューション別の修正状況
各ディストリビューションが公開している、この CVE の修正パッケージ
- Debian DEBIAN-CVE-2026-27588 caddy
- Ubuntu UBUNTU-CVE-2026-27588 caddy
参照URL
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- web github.com