CVE-2026-27585
MEDIUMCaddy < 2.11.1 - Path Sanitization Bypass via Backslash Handling
Title source: llmDescription
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.
References (4)
Core 4
Core References
Vendor Advisory x_refsource_confirm
https://github.com/caddyserver/caddy/security/advisories/GHSA-4xrr-hq4w-6vf4
Third Party Advisory x_refsource_misc
https://github.com/caddyserver/caddy/blob/68d50020eef0d4c3398b878f17c8092ca5b58ca0/modules/caddyhttp/fileserver/matcher.go#L361
Third Party Advisory x_refsource_misc
https://github.com/caddyserver/caddy/blob/68d50020eef0d4c3398b878f17c8092ca5b58ca0/modules/caddyhttp/fileserver/matcher.go#L398
Release Notes x_refsource_misc
https://github.com/caddyserver/caddy/releases/tag/v2.11.1
Scores
CVSS v3
6.5
EPSS
0.0027
EPSS Percentile
18.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-20
Status
published
Products (2)
caddyserver/caddy
< 2.11.1
caddyserver/caddy
0 - 2.11.1Go
Published
Feb 24, 2026
Tracked Since
Feb 25, 2026