CVE-2026-52844: Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, on Windows, Caddy path matchers treat /private\secret.txt as outside…

PriorityP350high7.5CVSS 3.1

AVNACLPRNUINSUCHINAN

EPSS

0.41%

32.7th percentile

Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, on Windows, Caddy path matchers treat /private\secret.txt as outside /private/*, but file_server later resolves the same request path as private\secret.txt on disk. An unauthenticated remote client can bypass Caddy path-scoped auth/deny routes protecting /private/*. This vulnerability is fixed in 2.11.4.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
caddyserver	caddy	< 2.11.4	2.11.4
github.com	caddyserver_caddy	0 – 1.0.5	—
github.com	caddyserver_caddy_v2	>= 0 < 2.11.4	2.11.4

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

ghsa6.5MEDIUM

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.