CVE-2026-27585 Details
Description
Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the path sanitization routine in file matcher doesn't sanitize backslashes which can lead to bypassing path related security protections. It affects users with specific Caddy and environment configurations. Version 2.11.1 fixes the issue.
A vulnerability exists in Caddy's file matcher path sanitization routine, which fails to properly handle backslashes. This oversight can lead to bypassing path-related security protections, particularly for users with specific Caddy and environment configurations. The issue is present in Caddy versions prior to 2.11.0 and can be exploited by crafting request paths that exploit the improper sanitization, potentially bypassing security measures such as access controls or routing directives.
Upgrade to Caddy version 2.11.1 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 26, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-20 | Improper Input Validation | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| caddyserver caddy | < 2.11.1 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Feb 25, 2026 | Initial Analysis | [email protected] |
| Feb 24, 2026 | New CVE Received | [email protected] |