Apple: >> Swiftnio >> 2.48.0 Security Vulnerabilities
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.
CVSS Score
5.3
EPSS Score
0.003
Published
2026-08-20