mirror of
https://github.com/multica-ai/multica.git
synced 2026-07-27 04:56:20 +02:00
7937599d0d
The onmessage handler dispatched every parsed frame to onAny and the
ws.on subscribers without validating its shape. A frame whose parsed JSON
lacked a string `type` (an out-of-protocol frame injected by a proxy /
extension, or a bare JSON primitive) reached the realtime-sync onAny
dispatcher, where `msg.type.split(":")` threw an uncaught TypeError out of
onmessage. The browser reported it via window.onerror, flooding PostHog
`$exception` (~12k events). Non-fatal (no crash, connection stays up), but
pure noise.
Validate once at this trust boundary: a frame must be an object carrying a
string `type`, otherwise drop it as a no-op. The bad-frame log is
rate-limited to one entry per connection — a misbehaving source can repeat
the frame hundreds of times per session.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: multica-agent <github@multica.ai>