CVE-2026-52844 | Caddy is an extensible server platform that uses TLS by defa… | CVSS 7.5 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-52844
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-08 18:41 UTC
Published: 2026-06-23 17:50 UTC
Last updated: 2026-06-23 20:06 UTC
Primary CWE: CWE-22
CWE-22: Improper Limitation of a Pathname to a Restricted Di…
Vendor / Product: caddyserver / caddy
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
caddyserver	caddy	—	< 2.11.4

Weakness (CWE)

CWE	Source	Description
CWE-22	cna	CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-284	cna	CWE-284: Improper Access Control

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.5	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References (1)

https://github.com/caddyserver/caddy/security/advisories/GHSA-qrp7-cvwr-j2c6 https://github.com/caddyserver/caddy/security/advisories/GHSA-qrp7-cvwr-j2c6