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Netty: [codec-http2] Lack of Host Header Deduplication in HTTP/2→HTTP/1.x Translation Leads to Request Routing Bypass

🗓️ 22 Jul 2026 21:49:28Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 3 Views

Netty's HTTP/2-to-HTTP/1.x translation layer (Http2StreamFrameToHttpObjectCodec and InboundHttp2ToHttpAdapter) fails to deduplicate or validate Host headers when an HTTP/2 client supplies both the :authority pseudo-header and a literal host header...

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22 Jul 2026 21:49Current
5.4Medium risk
Vulners AI Score5.4
3