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caddyserver — Vulnerabilities & Security Advisories 16

Browse all 16 CVE security advisories affecting caddyserver. AI-powered Chinese analysis, POCs, and references for each vulnerability.

Caddyserver is an open-source web server with automatic HTTPS that primarily serves static content and reverse proxies. Historically, it has been susceptible to remote code execution, cross-site scripting, and privilege escalation vulnerabilities, often stemming from improper input validation and insecure default configurations. While no major security incidents have been widely documented, its 8 recorded CVEs highlight potential risks in areas like path traversal and request smuggling. The platform's security posture benefits from regular updates and a focus on simplicity, though deployments should implement proper access controls and input sanitization to mitigate identified weaknesses.

Top products by caddyserver: caddy
CVE ID Title CVSS Severity Published
CVE-2026-92700 Caddy: fileHidden() case-sensitive pattern bypass — exposes "hidden" files via case variation — caddy CWE-178 6.3 Medium 2026-09-23
CVE-2026-92284 Caddy: Unbounded body buffer via {http.request.body} placeholder — memory exhaustion DoS — caddy CWE-770 6.9 Medium 2026-09-23
CVE-2026-77281 Caddy: rewrite placeholder re-expansion — caddy CWE-94 6.5 Medium 2026-09-17
CVE-2026-45135 Caddy: Unsafe Unicode Handling in FastCGI splitPos Allows Execution of Non-PHP Files — caddy CWE-20 8.1 High 2026-06-23
CVE-2026-45692 Caddy: Remote Admin Authorization Bypass in `/config` API via Array Index Normalization — caddy CWE-187 5.4 Medium 2026-06-23
CVE-2026-52845 Caddy: FastCGI header normalization bypass in `forward_auth copy_headers` — caddy CWE-287 8.1 High 2026-06-23
CVE-2026-52844 Caddy: Windows `file_server` path authorization bypass via encoded backslash — caddy CWE-22 7.5 High 2026-06-23
CVE-2026-52846 Caddy: stripHTML template function bypass — caddy CWE-116 4.2 Medium 2026-06-23
CVE-2026-30851 Caddy forward_auth copy_headers Does Not Strip Client-Supplied Headers, Allowing Identity Injection and Privilege Escalation — caddy CWE-287 8.1 High 2026-03-07
CVE-2026-30852 Caddy: vars_regexp double-expands user input, leaking env vars and files — caddy CWE-200 9.1 - 2026-03-07
CVE-2026-27590 Caddy: Unicode case-folding length expansion causes incorrect split_path index (SCRIPT_NAME/PATH_INFO confusion) in FastCGI transport — caddy CWE-20 9.8 - 2026-02-24
CVE-2026-27589 Caddy vulnerable to cross-origin config application via local admin API /load (caddy) — caddy CWE-352 6.5 - 2026-02-24
CVE-2026-27588 Caddy: MatchHost becomes case-sensitive for large host lists (>100), enabling host-based route/auth bypass — caddy CWE-178 9.1 - 2026-02-24
CVE-2026-27587 Caddy: MatchPath %xx (escaped-path) branch skips case normalization, enabling path-based route/auth bypass — caddy CWE-178 9.1 - 2026-02-24
CVE-2026-27586 Caddy's mTLS client authentication silently fails open when CA certificate file is missing or malformed — caddy CWE-755 8.2 - 2026-02-24
CVE-2026-27585 Caddy's improper sanitization of glob characters in file matcher may lead to bypassing security protections — caddy CWE-20 9.1 - 2026-02-24

This page lists every published CVE security advisory associated with caddyserver. Each entry links to a detailed page with CVSS scoring, CWE classification, affected products and references. AI-generated Chinese analysis is provided for fast triage.