CVE-2026-52844

EUVD-2026-38557
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.
Path Traversal
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 49.87%
Affected Products (NVD)
VendorProductVersion
caddyservercaddy
𝑥
< 2.11.4
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
caddy
bookworm
2.6.2-5
fixed
bookworm (security)
2.6.2-5+deb12u1
fixed
forky
2.11.4-1
fixed
sid
2.11.4-1
fixed
trixie
2.6.2-12+deb13u1
fixed
trixie (security)
2.6.2-12+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
caddy
jammy
dne
noble
needs-triage
questing
ignored
resolute
needs-triage
stonking
needs-triage
Common Weakness Enumeration
References
https://github.com/caddyserver/caddy/security/advisories/GHSA-qrp7-cvwr-j2c6
https://github.com/caddyserver/caddy/security/advisories/GHSA-qrp7-cvwr-j2c6