Trusted-proxy hardening (defense-in-depth for Authelia forward-auth):
- AuthMiddleware now only honors Remote-* identity headers when REMOTE_ADDR
is in a configured TRUSTED_PROXIES allowlist; otherwise it refuses with 403
and logs an 'untrusted_proxy' security event. Previously anything that could
reach PHP directly could spoof Remote-User/Remote-Groups and log in as admin.
- New config TRUSTED_PROXIES (comma-separated, from .env). Empty = enforcement
off, so this is backward compatible until the allowlist is set on a host.
Requirements checks (so a PHP upgrade dropping an extension can't silently
break features like avatars again):
- config/requirements.php: single source of truth for min PHP version and
required extensions (ldap, mysqli, curl, mbstring, fileinfo, json).
- scripts/check_requirements.php: CI script that fails the build if the
environment doesn't satisfy them.
- New 'requirements' CI job installs those extensions and runs the check;
deploy now depends on it.
- api/health.php: adds php_extensions + php_version checks so production
monitoring surfaces the drift (returns 503 if a required extension is gone).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
