PatchTheCVEswiftnio vulnerabilities and fixes
Recent CVEs affecting swiftnio, with upgrade or downgrade steps. 1 tracked.
swiftnio has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-08-20. Highest priority: CVE-2026-43678 (score 31/100).
- CVE-2026-43678 MEDIUM 5.3 UPGRADE An unauthenticated remote peer can crash any NIOWebSocket-based server (including Vapor and Hummingbird) with
FAQ
How do I fix swiftnio vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is swiftnio being exploited right now?
None of the tracked swiftnio CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which swiftnio CVE should I patch first?
CVE-2026-43678 currently ranks highest (31/100): An unauthenticated remote peer can crash any NIOWebSocket-based server (including Vapor and Hummingbird) with .