Improper Handling of Case Sensitivity Affecting caddy-man package, versions <2.11.1-r0


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.04% (13th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-CADDYMAN-15365595
  • published1 Mar 2026
  • disclosed24 Feb 2026

Introduced: 24 Feb 2026

NewCVE-2026-27588  (opens in a new tab)
CWE-178  (opens in a new tab)

How to fix?

Upgrade Minimos:latest caddy-man to version 2.11.1-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream caddy-man package and not the caddy-man package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1