`/api/send` is the public Umami proxy. The hand-rolled allowlist it
carried predated the central `isPublicUrl` helper in
`src/lib/validations/notifications.ts` and was missing every
notation-bypass class the helper catches:
- 100.64.0.0/10 CGNAT
- 0.0.0.0/8 (only the literal `0.0.0.0` was matched)
- 169.254/16 outside the AWS metadata IP (e.g. azure metadata is
`169.254.169.254` too, but other addresses in the block are
routable to other internal endpoints)
- IPv6 ULA (`fc00::/7`)
- IPv4-mapped IPv6 (`::ffff:127.0.0.1`)
- Leading-zero IPv4 octal bypass (`http://010.0.0.1` → 8.0.0.1)
- Hex IPv4 (`http://0x7f.0.0.1`)
- Pure-decimal IPv4 (`http://2130706433`)
The dev-mode escape hatch is also dropped — serving the proxy against
a localhost / RFC1918 Umami target was never a useful configuration
anyway, since the proxy sends the visitor's user-agent + body upstream
which only makes sense against an externally-reachable analytics host.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
HealthLog — personal health-tracking PWA with weight, blood pressure,
pulse, mood tracking, medication compliance, Withings integration,
doctor report PDF export, and Dracula-themed UI.