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Vulnerabilities
Vulnerable Software

Vulnerability Details 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 WebSocket handshake, dropping all active connections until the process restarts. This vulnerability is addressed in swift-nio version 2.101.0.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 20.5%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2026-43678
  • Apple » Swiftnio » Version: 1.0.0
    cpe:2.3:a:apple:swiftnio:1.0.0
  • Apple » Swiftnio » Version: 1.0.1
    cpe:2.3:a:apple:swiftnio:1.0.1
  • Apple » Swiftnio » Version: 1.1.0
    cpe:2.3:a:apple:swiftnio:1.1.0
  • Apple » Swiftnio » Version: 1.1.1
    cpe:2.3:a:apple:swiftnio:1.1.1
  • Apple » Swiftnio » Version: 1.10.0
    cpe:2.3:a:apple:swiftnio:1.10.0
  • Apple » Swiftnio » Version: 1.11.0
    cpe:2.3:a:apple:swiftnio:1.11.0
  • Apple » Swiftnio » Version: 1.12.0
    cpe:2.3:a:apple:swiftnio:1.12.0
  • Apple » Swiftnio » Version: 1.2.0
    cpe:2.3:a:apple:swiftnio:1.2.0
  • Apple » Swiftnio » Version: 1.2.1
    cpe:2.3:a:apple:swiftnio:1.2.1
  • Apple » Swiftnio » Version: 1.2.2
    cpe:2.3:a:apple:swiftnio:1.2.2
  • Apple » Swiftnio » Version: 1.3.0
    cpe:2.3:a:apple:swiftnio:1.3.0
  • Apple » Swiftnio » Version: 1.3.1
    cpe:2.3:a:apple:swiftnio:1.3.1
  • Apple » Swiftnio » Version: 1.3.2
    cpe:2.3:a:apple:swiftnio:1.3.2
  • Apple » Swiftnio » Version: 1.4.0
    cpe:2.3:a:apple:swiftnio:1.4.0
  • Apple » Swiftnio » Version: 1.4.1
    cpe:2.3:a:apple:swiftnio:1.4.1
  • Apple » Swiftnio » Version: 1.4.2
    cpe:2.3:a:apple:swiftnio:1.4.2
  • Apple » Swiftnio » Version: 1.4.3
    cpe:2.3:a:apple:swiftnio:1.4.3
  • Apple » Swiftnio » Version: 1.5.0
    cpe:2.3:a:apple:swiftnio:1.5.0
  • Apple » Swiftnio » Version: 1.5.1
    cpe:2.3:a:apple:swiftnio:1.5.1
  • Apple » Swiftnio » Version: 1.5.2
    cpe:2.3:a:apple:swiftnio:1.5.2
  • Apple » Swiftnio » Version: 1.6.0
    cpe:2.3:a:apple:swiftnio:1.6.0
  • Apple » Swiftnio » Version: 1.6.1
    cpe:2.3:a:apple:swiftnio:1.6.1
  • Apple » Swiftnio » Version: 1.6.2
    cpe:2.3:a:apple:swiftnio:1.6.2
  • Apple » Swiftnio » Version: 1.7.0
    cpe:2.3:a:apple:swiftnio:1.7.0
  • Apple » Swiftnio » Version: 1.7.1
    cpe:2.3:a:apple:swiftnio:1.7.1
  • Apple » Swiftnio » Version: 1.7.2
    cpe:2.3:a:apple:swiftnio:1.7.2
  • Apple » Swiftnio » Version: 1.7.3
    cpe:2.3:a:apple:swiftnio:1.7.3
  • Apple » Swiftnio » Version: 1.8.0
    cpe:2.3:a:apple:swiftnio:1.8.0
  • Apple » Swiftnio » Version: 1.9.0
    cpe:2.3:a:apple:swiftnio:1.9.0
  • Apple » Swiftnio » Version: 1.9.1
    cpe:2.3:a:apple:swiftnio:1.9.1
  • Apple » Swiftnio » Version: 1.9.2
    cpe:2.3:a:apple:swiftnio:1.9.2
  • Apple » Swiftnio » Version: 1.9.3
    cpe:2.3:a:apple:swiftnio:1.9.3
  • Apple » Swiftnio » Version: 1.9.4
    cpe:2.3:a:apple:swiftnio:1.9.4
  • Apple » Swiftnio » Version: 1.9.5
    cpe:2.3:a:apple:swiftnio:1.9.5
  • Apple » Swiftnio » Version: 2.100.0
    cpe:2.3:a:apple:swiftnio:2.100.0
  • Apple » Swiftnio » Version: 2.13.0
    cpe:2.3:a:apple:swiftnio:2.13.0
  • Apple » Swiftnio » Version: 2.13.1
    cpe:2.3:a:apple:swiftnio:2.13.1
  • Apple » Swiftnio » Version: 2.14.0
    cpe:2.3:a:apple:swiftnio:2.14.0
  • Apple » Swiftnio » Version: 2.15.0
    cpe:2.3:a:apple:swiftnio:2.15.0
  • Apple » Swiftnio » Version: 2.16.0
    cpe:2.3:a:apple:swiftnio:2.16.0
  • Apple » Swiftnio » Version: 2.16.1
    cpe:2.3:a:apple:swiftnio:2.16.1
  • Apple » Swiftnio » Version: 2.17.0
    cpe:2.3:a:apple:swiftnio:2.17.0
  • Apple » Swiftnio » Version: 2.18.0
    cpe:2.3:a:apple:swiftnio:2.18.0
  • Apple » Swiftnio » Version: 2.19.0
    cpe:2.3:a:apple:swiftnio:2.19.0
  • Apple » Swiftnio » Version: 2.20.0
    cpe:2.3:a:apple:swiftnio:2.20.0
  • Apple » Swiftnio » Version: 2.20.1
    cpe:2.3:a:apple:swiftnio:2.20.1
  • Apple » Swiftnio » Version: 2.20.2
    cpe:2.3:a:apple:swiftnio:2.20.2
  • Apple » Swiftnio » Version: 2.21.0
    cpe:2.3:a:apple:swiftnio:2.21.0
  • Apple » Swiftnio » Version: 2.22.0
    cpe:2.3:a:apple:swiftnio:2.22.0
  • Apple » Swiftnio » Version: 2.22.1
    cpe:2.3:a:apple:swiftnio:2.22.1
  • Apple » Swiftnio » Version: 2.23.0
    cpe:2.3:a:apple:swiftnio:2.23.0
  • Apple » Swiftnio » Version: 2.24.0
    cpe:2.3:a:apple:swiftnio:2.24.0
  • Apple » Swiftnio » Version: 2.25.0
    cpe:2.3:a:apple:swiftnio:2.25.0
  • Apple » Swiftnio » Version: 2.25.1
    cpe:2.3:a:apple:swiftnio:2.25.1
  • Apple » Swiftnio » Version: 2.26.0
    cpe:2.3:a:apple:swiftnio:2.26.0
  • Apple » Swiftnio » Version: 2.27.0
    cpe:2.3:a:apple:swiftnio:2.27.0
  • Apple » Swiftnio » Version: 2.28.0
    cpe:2.3:a:apple:swiftnio:2.28.0
  • Apple » Swiftnio » Version: 2.29.0
    cpe:2.3:a:apple:swiftnio:2.29.0
  • Apple » Swiftnio » Version: 2.29.1
    cpe:2.3:a:apple:swiftnio:2.29.1
  • Apple » Swiftnio » Version: 2.30.0
    cpe:2.3:a:apple:swiftnio:2.30.0
  • Apple » Swiftnio » Version: 2.31.0
    cpe:2.3:a:apple:swiftnio:2.31.0
  • Apple » Swiftnio » Version: 2.31.1
    cpe:2.3:a:apple:swiftnio:2.31.1
  • Apple » Swiftnio » Version: 2.31.2
    cpe:2.3:a:apple:swiftnio:2.31.2
  • Apple » Swiftnio » Version: 2.32.0
    cpe:2.3:a:apple:swiftnio:2.32.0
  • Apple » Swiftnio » Version: 2.32.1
    cpe:2.3:a:apple:swiftnio:2.32.1
  • Apple » Swiftnio » Version: 2.32.2
    cpe:2.3:a:apple:swiftnio:2.32.2
  • Apple » Swiftnio » Version: 2.32.3
    cpe:2.3:a:apple:swiftnio:2.32.3
  • Apple » Swiftnio » Version: 2.33.0
    cpe:2.3:a:apple:swiftnio:2.33.0
  • Apple » Swiftnio » Version: 2.34.0
    cpe:2.3:a:apple:swiftnio:2.34.0
  • Apple » Swiftnio » Version: 2.35.0
    cpe:2.3:a:apple:swiftnio:2.35.0
  • Apple » Swiftnio » Version: 2.36.0
    cpe:2.3:a:apple:swiftnio:2.36.0
  • Apple » Swiftnio » Version: 2.37.0
    cpe:2.3:a:apple:swiftnio:2.37.0
  • Apple » Swiftnio » Version: 2.38.0
    cpe:2.3:a:apple:swiftnio:2.38.0
  • Apple » Swiftnio » Version: 2.39.0
    cpe:2.3:a:apple:swiftnio:2.39.0
  • Apple » Swiftnio » Version: 2.39.1
    cpe:2.3:a:apple:swiftnio:2.39.1
  • Apple » Swiftnio » Version: 2.40.0
    cpe:2.3:a:apple:swiftnio:2.40.0
  • Apple » Swiftnio » Version: 2.41.0
    cpe:2.3:a:apple:swiftnio:2.41.0
  • Apple » Swiftnio » Version: 2.41.1
    cpe:2.3:a:apple:swiftnio:2.41.1
  • Apple » Swiftnio » Version: 2.42.0
    cpe:2.3:a:apple:swiftnio:2.42.0
  • Apple » Swiftnio » Version: 2.42.1
    cpe:2.3:a:apple:swiftnio:2.42.1
  • Apple » Swiftnio » Version: 2.43.0
    cpe:2.3:a:apple:swiftnio:2.43.0
  • Apple » Swiftnio » Version: 2.43.1
    cpe:2.3:a:apple:swiftnio:2.43.1
  • Apple » Swiftnio » Version: 2.44.0
    cpe:2.3:a:apple:swiftnio:2.44.0
  • Apple » Swiftnio » Version: 2.45.0
    cpe:2.3:a:apple:swiftnio:2.45.0
  • Apple » Swiftnio » Version: 2.46.0
    cpe:2.3:a:apple:swiftnio:2.46.0
  • Apple » Swiftnio » Version: 2.47.0
    cpe:2.3:a:apple:swiftnio:2.47.0
  • Apple » Swiftnio » Version: 2.48.0
    cpe:2.3:a:apple:swiftnio:2.48.0
  • Apple » Swiftnio » Version: 2.49.0
    cpe:2.3:a:apple:swiftnio:2.49.0
  • Apple » Swiftnio » Version: 2.50.0
    cpe:2.3:a:apple:swiftnio:2.50.0
  • Apple » Swiftnio » Version: 2.51.0
    cpe:2.3:a:apple:swiftnio:2.51.0
  • Apple » Swiftnio » Version: 2.51.1
    cpe:2.3:a:apple:swiftnio:2.51.1
  • Apple » Swiftnio » Version: 2.52.0
    cpe:2.3:a:apple:swiftnio:2.52.0
  • Apple » Swiftnio » Version: 2.53.0
    cpe:2.3:a:apple:swiftnio:2.53.0
  • Apple » Swiftnio » Version: 2.54.0
    cpe:2.3:a:apple:swiftnio:2.54.0
  • Apple » Swiftnio » Version: 2.55.0
    cpe:2.3:a:apple:swiftnio:2.55.0
  • Apple » Swiftnio » Version: 2.56.0
    cpe:2.3:a:apple:swiftnio:2.56.0
  • Apple » Swiftnio » Version: 2.57.0
    cpe:2.3:a:apple:swiftnio:2.57.0
  • Apple » Swiftnio » Version: 2.58.0
    cpe:2.3:a:apple:swiftnio:2.58.0
  • Apple » Swiftnio » Version: 2.59.0
    cpe:2.3:a:apple:swiftnio:2.59.0
  • Apple » Swiftnio » Version: 2.60.0
    cpe:2.3:a:apple:swiftnio:2.60.0
  • Apple » Swiftnio » Version: 2.61.0
    cpe:2.3:a:apple:swiftnio:2.61.0
  • Apple » Swiftnio » Version: 2.61.1
    cpe:2.3:a:apple:swiftnio:2.61.1
  • Apple » Swiftnio » Version: 2.62.0
    cpe:2.3:a:apple:swiftnio:2.62.0
  • Apple » Swiftnio » Version: 2.63.0
    cpe:2.3:a:apple:swiftnio:2.63.0
  • Apple » Swiftnio » Version: 2.64.0
    cpe:2.3:a:apple:swiftnio:2.64.0
  • Apple » Swiftnio » Version: 2.65.0
    cpe:2.3:a:apple:swiftnio:2.65.0
  • Apple » Swiftnio » Version: 2.66.0
    cpe:2.3:a:apple:swiftnio:2.66.0
  • Apple » Swiftnio » Version: 2.67.0
    cpe:2.3:a:apple:swiftnio:2.67.0
  • Apple » Swiftnio » Version: 2.68.0
    cpe:2.3:a:apple:swiftnio:2.68.0
  • Apple » Swiftnio » Version: 2.69.0
    cpe:2.3:a:apple:swiftnio:2.69.0
  • Apple » Swiftnio » Version: 2.70.0
    cpe:2.3:a:apple:swiftnio:2.70.0
  • Apple » Swiftnio » Version: 2.71.0
    cpe:2.3:a:apple:swiftnio:2.71.0
  • Apple » Swiftnio » Version: 2.72.0
    cpe:2.3:a:apple:swiftnio:2.72.0
  • Apple » Swiftnio » Version: 2.73.0
    cpe:2.3:a:apple:swiftnio:2.73.0
  • Apple » Swiftnio » Version: 2.74.0
    cpe:2.3:a:apple:swiftnio:2.74.0
  • Apple » Swiftnio » Version: 2.75.0
    cpe:2.3:a:apple:swiftnio:2.75.0
  • Apple » Swiftnio » Version: 2.76.0
    cpe:2.3:a:apple:swiftnio:2.76.0
  • Apple » Swiftnio » Version: 2.76.1
    cpe:2.3:a:apple:swiftnio:2.76.1
  • Apple » Swiftnio » Version: 2.77.0
    cpe:2.3:a:apple:swiftnio:2.77.0
  • Apple » Swiftnio » Version: 2.78.0
    cpe:2.3:a:apple:swiftnio:2.78.0
  • Apple » Swiftnio » Version: 2.79.0
    cpe:2.3:a:apple:swiftnio:2.79.0
  • Apple » Swiftnio » Version: 2.80.0
    cpe:2.3:a:apple:swiftnio:2.80.0
  • Apple » Swiftnio » Version: 2.81.0
    cpe:2.3:a:apple:swiftnio:2.81.0
  • Apple » Swiftnio » Version: 2.82.0
    cpe:2.3:a:apple:swiftnio:2.82.0
  • Apple » Swiftnio » Version: 2.82.1
    cpe:2.3:a:apple:swiftnio:2.82.1
  • Apple » Swiftnio » Version: 2.83.0
    cpe:2.3:a:apple:swiftnio:2.83.0
  • Apple » Swiftnio » Version: 2.84.0
    cpe:2.3:a:apple:swiftnio:2.84.0
  • Apple » Swiftnio » Version: 2.85.0
    cpe:2.3:a:apple:swiftnio:2.85.0
  • Apple » Swiftnio » Version: 2.86.0
    cpe:2.3:a:apple:swiftnio:2.86.0
  • Apple » Swiftnio » Version: 2.86.1
    cpe:2.3:a:apple:swiftnio:2.86.1
  • Apple » Swiftnio » Version: 2.86.2
    cpe:2.3:a:apple:swiftnio:2.86.2
  • Apple » Swiftnio » Version: 2.87.0
    cpe:2.3:a:apple:swiftnio:2.87.0
  • Apple » Swiftnio » Version: 2.88.0
    cpe:2.3:a:apple:swiftnio:2.88.0
  • Apple » Swiftnio » Version: 2.89.0
    cpe:2.3:a:apple:swiftnio:2.89.0
  • Apple » Swiftnio » Version: 2.90.0
    cpe:2.3:a:apple:swiftnio:2.90.0
  • Apple » Swiftnio » Version: 2.90.1
    cpe:2.3:a:apple:swiftnio:2.90.1
  • Apple » Swiftnio » Version: 2.91.0
    cpe:2.3:a:apple:swiftnio:2.91.0
  • Apple » Swiftnio » Version: 2.92.0
    cpe:2.3:a:apple:swiftnio:2.92.0
  • Apple » Swiftnio » Version: 2.92.1
    cpe:2.3:a:apple:swiftnio:2.92.1
  • Apple » Swiftnio » Version: 2.92.2
    cpe:2.3:a:apple:swiftnio:2.92.2
  • Apple » Swiftnio » Version: 2.93.0
    cpe:2.3:a:apple:swiftnio:2.93.0
  • Apple » Swiftnio » Version: 2.94.0
    cpe:2.3:a:apple:swiftnio:2.94.0
  • Apple » Swiftnio » Version: 2.94.1
    cpe:2.3:a:apple:swiftnio:2.94.1
  • Apple » Swiftnio » Version: 2.95.0
    cpe:2.3:a:apple:swiftnio:2.95.0
  • Apple » Swiftnio » Version: 2.96.0
    cpe:2.3:a:apple:swiftnio:2.96.0
  • Apple » Swiftnio » Version: 2.97.0
    cpe:2.3:a:apple:swiftnio:2.97.0
  • Apple » Swiftnio » Version: 2.97.1
    cpe:2.3:a:apple:swiftnio:2.97.1
  • Apple » Swiftnio » Version: 2.98.0
    cpe:2.3:a:apple:swiftnio:2.98.0
  • Apple » Swiftnio » Version: 2.99.0
    cpe:2.3:a:apple:swiftnio:2.99.0


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