CVE-2026-27587
Description
A flaw was found in Caddy, an extensible server platform. The HTTP path request matcher, intended to be case-insensitive, incorrectly processes percent-escape sequences. This vulnerability allows a remote attacker to bypass path-based routing and associated access controls by manipulating the casing of percent-escaped characters in the request path. This can lead to unauthorized access to protected resources.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
Frequently Asked Questions
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