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Traefik has a Potential mTLS Bypass via Fragmented TLS ClientHello Causing Pre-SNI Sniff Fallback to Default Non-mTLS TLS Config

🗓️ 20 Mar 2026 15:43:01Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 7 Views

Traefik TLS SNI sniff fails on fragmented ClientHello, causing fallback to non-mTLS and bypass of mutual authentication.

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20 Mar 2026 15:43Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.15.3
CVSS 47.8
EPSS0.00015
SSVC
7