Security Advisory

CVE-2026-43678

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-20 18:57:03

Last updated 2026-08-20 21:10:49

Assigner apple

CVSS score 5.3

State PUBLISHED

Description

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.

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