Executive brief
Caddy forward_auth copy_headers allows Identity Injection and Privilege Escalation in github.com/caddyserver/caddy
Affected products
- Go github.com/caddyserver/caddy/v2
- Go github.com/caddyserver/caddy/v2/modules/caddyhttp/reverseproxy
Junglewise Threat Intelligence
CVE-2026-30851: GO-2026-4639 - Caddy forward_auth copy_headers allows Identity Injection and Privilege Escalation in github.com/caddyserver/caddy
CVE-2026-30851 · Severity: low · CVSS 3.1 · Published 2026-03-10
Technologies: github.com/caddyserver/caddy/v2 (Go). Vendors: Go.
Related threats
- Caddy placeholder re-expansion in URI rewrite
- GO-2026-5408 - Caddy: Remote Admin Authorization Bypass on PKI Endpoints via Prefix-Based Path Matching in github.com/caddyserver/caddy
- GO-2026-5730 - Caddy Fix Bypass in github.com/caddyserver/caddy
- Caddyserver Caddy XSS bypass in stripHTML template function
- Caddy authentication bypass via FastCGI header normalization collision