medium5.3
CVE-2026-43678
An unauthenticated remote peer can crash any NIOWebSocket-based server (including Vapor and Hummingbird) with a single 11-byte frame sent after a completed Web…
Impact
An unauthenticated remote peer can crash any NIOWebSocket-based server (including Vapor and Hummingbird) with a single 11-byte frame sent after a completed WebSocket handshake, dropping all active connections until the process restarts. This vulnerability is addressed in swift-nio version 2.101.0.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Apple | Swiftnio | before 2.101.0 |