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Traefik: HTTP/3 mTLS bypass via exact SNI TLSOptions lookup for wildcard and mixed-case hosts

🗓️ 16 Jun 2026 21:04:29Reported by GitHub Advisory DatabaseType 
github
 github🔗 github.com👁 4 Views

Summary There is a critical vulnerability in Traefik's HTTP/3 (QUIC) TLS configuration selection that allows unauthenticated clients to bypass router-specific mTLS enforcement. When HTTP/3 is enabled on an entrypoint, the TLS handshake selects the...

Related
Detection
Refs
ReporterTitlePublishedViews
Family
Circl		CVE-2026-53622
5 Jun 202610:26
–circl
CVE		CVE-2026-53622
16 Jun 202621:04
–cve
OSV		GHSA-9CR8-Q42Q-G8M7 Traefik: HTTP/3 mTLS bypass via exact SNI TLSOptions lookup for wildcard and mixed-case hosts
16 Jun 202621:04
–osv
Positive Technologies		PT-2026-50163
16 Jun 202600:00
–ptsecurity
Vulners
Node
traefiktraefikRange≤1.7.34go
OR
traefiktraefikRange≤2.11.50go
OR
traefiktraefikRange≤3.7.2go

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16 Jun 2026 21:04Current
5.7Medium risk
Vulners AI Score5.7
EPSS0.00042
CWE-288
4