# CVE-2026-92700: Caddy fileHidden case-sensitivity bypass on case-insensitive filesystems

Source: https://junglewise.ai/threats/cve-2026-92700-caddy-is-an-extensible-server-platform-that-uses-tls-by-default  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-23. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-92700 · Severity: info · Published 2026-09-23

Caddy is a web server that protects sensitive files through hide rules. In version 2.11.3 and earlier, an attacker can bypass these hide rules on case-insensitive filesystems by using mixed-case path variants, exposing files the administrator intended to keep hidden. This could leak configuration files, credentials, or other sensitive data served by the web server.

Technologies: [Caddy](https://junglewise.ai/threats/technologies/caddy-caddy). Vendors: [Caddy](https://junglewise.ai/threats/vendors/caddy).

## Quick answers

**Is CVE-2026-92700 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-92700 being exploited in the wild.

**How severe is CVE-2026-92700?** Informational severity, published 23 September 2026.

**Which products and versions are affected?** Caddy 2.11.3 and earlier.

**Is there a fix for CVE-2026-92700?** A patch was published on 2026-07-10: Patched in v2.11.4 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-92700 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-92700?** Check whether you run Caddy at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The fileHidden() function in modules/caddyhttp/fileserver/staticfiles.go uses case-sensitive filepath.Match checks to enforce hide rules. On case-insensitive filesystems (Windows, macOS by default) or when mixed-case path variants coexist, attackers can request hidden files using case variants that bypass the hide rule checks. The vulnerability requires no authentication and is exploitable via simple HTTP requests to the web server.

## Affected products

- Caddy Caddy 2.11.3 and earlier

## Timeline

- 2026-09-23: disclosed
- 2026-07-10: patched: Patched in v2.11.4

## References

- [https://github.com/caddyserver/caddy/security/advisories/GHSA-j8px-rmrx-76h9](https://github.com/caddyserver/caddy/security/advisories/GHSA-j8px-rmrx-76h9)

## Related threats

- [Caddy has an RFC 7230 §6.1 compliance issue / Hop-by-hop headers that leak through](https://junglewise.ai/threats/cve-2026-55458-caddy-has-an-rfc-7230-6-1-compliance-issue-hop-by-hop-headers)
- [Caddy unbounded body buffer denial of service](https://junglewise.ai/threats/cve-2026-92284-caddy-is-an-extensible-server-platform-that-uses-tls-by-default)