CVE-2026-52844

FAUCET Score

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.

First published: Jun 23, 2026Last modified: Jun 23, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 2.11.4CPE matchmatch criteria	cpe:2.3:a:caddyserver:caddy::::::::

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

Exploitability Score

3.9

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.48%

Probability of exploitation in next 30 days

EPSS Percentile

38.6%

Percentile rank of EPSS score among Peer Group

As of 2026-07-26

Model: v2026.06.15

This CVE's current EPSS score of 0.0048 is in the 17th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

gopatch availablevia ghsa

Product: github.com/caddyserver/caddy/v2Fixed in: 2.11.4

Vendor Advisories (1)

goGHSA-qrp7-cvwr-j2c6high

Caddy: Windows `file_server` path authorization bypass via encoded backslash

Jun 16, 2026

References

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

Third Party AdvisoryExploit