Web Application Vulnerabilities Runtime SCA Findings
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Caddy Web Server Improper Handling of Case Sensitivity Vulnerability - CVE-2026-27587 - Vulnerability Database
Caddy Web Server

Caddy Web Server Improper Handling of Case Sensitivity Vulnerability - CVE-2026-27587

Critical
Reference: CVE-2026-27587
NVD Link: https://nvd.nist.gov/vuln/detail/CVE-2026-27587
Title: Caddy Web Server Improper Handling of Case Sensitivity Vulnerability
Overview:

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1 Caddy39s HTTP path request matcher is intended to be case-insensitive but when the match pattern contains percent-escape sequences (xx) it compares against the request39s 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.