Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
caddyserver caddy — Caddy: Windows `file_server` path authorization bypass via encoded backslash
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N U H N N 7.5 .0048 39.4 —
AFFECTED
Product Versions Fixed
caddy < 2.11.4 – —
TIMELINE
Jun 8 Reserved by GitHub_M
Jun 23 EXPLOIT PUBLISHED — CVE-2026-52844 (caddyserver caddy). Public exploit reference added.
Jun 23 Published (CNA: GitHub_M)
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| June 8, 2026 | Reserved | Reserved by GitHub_M |
| June 23, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-52844 (caddyserver caddy). Public exploit reference added. |
| June 23, 2026 | Published | Published (CNA: GitHub_M) |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| caddyserver | caddy | — | < 2.11.4 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-52844 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.