Threats Tagged 'ghsa-5r4w-85f3-pw66'
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Threats Tagged 'ghsa-5r4w-85f3-pw66'
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0 A high severity vulnerability in Traefik's domain-fronting protection (SNICheck) allows an unauthenticated client to bypass mutual TLS enforcement when wildcard TLSOptions are used. The issue arises because SNICheck resolves TLS options for HTTP Host headers using exact matches only, ignoring wildcard mappings. This enables an attacker to complete a TLS handshake under permissive options and then send an HTTP Host header targeting a wildcard-protected backend, bypassing client certificate requirements. The vulnerability affects HTTPS and HTTP/2 traffic and does not require HTTP/3. A fix is available in Traefik version 3.7.3 and later. Join the discussion | GCVE Database | 06/16/2026, 19:02:20 UTC Added: 09/01/2026, 15:45:02 UTC |
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