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CVE-2026-93567 Io.netty/netty-codec-http2: http/1 authority-form connect is translated to malformed http/2 connect with host-controlled :authority

🗓️ 18 Sep 2026 14:23:27Reported by redhatType 
vulnrichment
 vulnrichment
🔗 github.com👁 2 Views

A flaw was found in Netty's HTTP/2 codec. When converting HTTP/1 CONNECT requests to HTTP/2, the component incorrectly uses the Host header instead of the CONNECT authority-form request-target for the tunnel authority. A remote attacker can exploi...

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21 Sep 2026 16:37Current
CVSS 3.17.5
EPSS0.00396
SSVC
2