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SwiftNIO HTTP/2: HTTP/2-to-HTTP/1 Request Smuggling via unvalidated :path pseudo-header in HTTP2ToHTTP1Codec

🗓️ 12 Jun 2026 15:08:16Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 5 Views

swift-nio-http2's HTTP/2-to-HTTP/1.1 codec (HTTP2FramePayloadToHTTP1ServerCodec / HTTP2ToHTTP1ServerCodec) did not validate pseudo-header values for control characters before placing them into the translated HTTP/1.1 message. A remote attacker cou...

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12 Jun 2026 15:08Current
5.5Medium risk
Vulners AI Score5.5
5