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CVE-2026-27588 Caddy: MatchHost becomes case-sensitive for large host lists (>100), enabling host-based route/auth bypass

🗓️ 24 Feb 2026 16:28:28Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 21 Views

Caddy match becomes case sensitive with large host lists, enabling route bypass; fixed in 2.11.1.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-27588
24 Feb 202616:28
attackerkb
AlpineLinux
CVE-2026-27588
24 Feb 202616:28
alpinelinux
Circl
CVE-2026-27588
23 Feb 202604:23
circl
CNNVD
Caddy 安全漏洞
24 Feb 202600:00
cnnvd
CVE
CVE-2026-27588
24 Feb 202616:28
cve
Debian CVE
CVE-2026-27588
24 Feb 202616:28
debiancve
Github Security Blog
Caddy: MatchHost becomes case-sensitive for large host lists (>100), enabling host-based route/auth bypass
24 Feb 202620:34
github
NVD
CVE-2026-27588
24 Feb 202617:29
nvd
OSV
CVE-2026-27588 Caddy: MatchHost becomes case-sensitive for large host lists (>100), enabling host-based route/auth bypass
24 Feb 202616:28
osv
OSV
DEBIAN-CVE-2026-27588
24 Feb 202617:29
osv
Rows per page
[
  {
    "vendor": "caddyserver",
    "product": "caddy",
    "versions": [
      {
        "version": "< 2.11.1",
        "status": "affected"
      }
    ]
  }
]

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24 Feb 2026 16:28Current
CVSS 48.7
EPSS0.00062
21