CVE-2026-27585

Publication date 24 February 2026

Last updated 27 February 2026

Ubuntu priority

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
caddy	25.10 questing	Needs evaluation
	24.04 LTS noble	Needs evaluation
	22.04 LTS jammy	Not in release

How can I get the fixes?
What do statuses mean?

References

MITRE
NVD
Launchpad
Debian

Other references

https://www.cve.org/CVERecord?id=CVE-2026-27585
https://github.com/caddyserver/caddy/security/advisories/GHSA-4xrr-hq4w-6vf4
https://github.com/caddyserver/caddy/blob/68d50020eef0d4c3398b878f17c8092ca5b58ca0/modules/caddyhttp/fileserver/matcher.go#L361
https://github.com/caddyserver/caddy/blob/68d50020eef0d4c3398b878f17c8092ca5b58ca0/modules/caddyhttp/fileserver/matcher.go#L398
https://github.com/caddyserver/caddy/releases/tag/v2.11.1