Improper Handling of Case Sensitivity Affecting caddy-src 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-CADDYSRC-15365327
  • published1 Mar 2026
  • disclosed24 Feb 2026

Introduced: 24 Feb 2026

NewCVE-2026-27587  (opens in a new tab)
CWE-178  (opens in a new tab)

How to fix?

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

NVD Description

Note: Versions mentioned in the description apply only to the upstream caddy-src package and not the caddy-src 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 path request matcher is intended to be case-insensitive, but when the match pattern contains percent-escape sequences (%xx) it compares against the request's escaped path without lowercasing. An attacker can bypass path-based routing and any access controls attached to that route by changing the casing of the request path. Version 2.11.1 contains a fix for the issue.

CVSS Base Scores

version 3.1