Bug 2520715 (CVE-2026-43678) - CVE-2026-43678 swift-nio: swift-nio: Denial of Service via specially crafted WebSocket frame
Summary: CVE-2026-43678 swift-nio: swift-nio: Denial of Service via specially crafted ...
Keywords:
Status: NEW
Alias: CVE-2026-43678
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-20 19:14 UTC by OSIDB Bzimport
Modified: 2026-08-22 12:27 UTC (History)
0 users

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Description OSIDB Bzimport 2026-08-20 19:14:12 UTC 
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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