Medium severity6.5NVD Advisory· Published Feb 24, 2026· Updated Jun 17, 2026
CVE-2026-27585
CVE-2026-27585
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/caddyserver/caddy/v2Go | < 2.11.1 | 2.11.1 |
Affected products
5cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:*range: <2.11.1
- (no CPE)range: < 2.11.1
- ghsa-coords3 versionspkg:golang/github.com/caddyserver/caddy/v2pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
< 2.11.1+ 2 more
- (no CPE)range: < 2.11.1
- (no CPE)range: < 0.0.20260226T182644-150000.1.149.1
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
8- github.com/caddyserver/caddy/security/advisories/GHSA-4xrr-hq4w-6vf4nvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-4xrr-hq4w-6vf4ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-27585ghsaADVISORY
- caddyserver.com/docs/caddyfile/directivesghsaWEB
- github.com/caddyserver/caddy/blob/68d50020eef0d4c3398b878f17c8092ca5b58ca0/modules/caddyhttp/fileserver/matcher.gonvdProductWEB
- github.com/caddyserver/caddy/blob/68d50020eef0d4c3398b878f17c8092ca5b58ca0/modules/caddyhttp/fileserver/matcher.gonvdProductWEB
- github.com/caddyserver/caddy/releases/tag/v2.11.1nvdRelease NotesWEB
- pkg.go.dev/vuln/GO-2026-4535ghsaWEB
News mentions
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