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CVE-2026-75595 Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext

🗓️ 19 Aug 2026 21:00:27Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 63 Views

Netty 4.1/4.2 SNI bypass via fragmented ClientHello falls back to default SslContext, bypassing mTLS.

Related
Affected
Refs
[
  {
    "vendor": "netty",
    "product": "netty",
    "versions": [
      {
        "version": "< 4.1.137.Final",
        "status": "affected"
      },
      {
        "version": ">= 4.2.0.Final, < 4.2.17.Final",
        "status": "affected"
      }
    ]
  }
]

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19 Aug 2026 21:00Current
CVSS 49.1
EPSS0.00457
SSVC
63