cvedb.io
CVE-2026-27587
CRITICAL · CVSS 9.1
EPSS exploitation probability: 0%
Published 2026-02-24T17:29:03.953 · Last modified 2026-06-17T10:27:21.000

Summary

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.

Affected products

caddyserver — caddy

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.