En resumen
- CVE-2026-59900 es una vulnerabilidad MEDIO (CVSS 5.3) que afecta a io.netty:netty-codec-http2, netty (netty).
- Probabilidad de explotación en los próximos 30 días (EPSS): 0.40%, mayor que el 34.1% de las vulnerabilidades.
- Solución: actualizar a 4.2.16.Final, 4.1.136.Final, 4.2.16, 4.1.136 o posterior.
| Package | Affected versions | Patched versions |
|---|
| io.netty:netty-codec-http2 Maven | ≥ 4.2.0.Final, < 4.2.16.Final< 4.1.136.Final
| 4.2.16.Final4.1.136.Final
|
| netty | ≥ 4.2.0, < 4.2.16< 4.1.136
| 4.2.164.1.136
|
Description
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 in a single HEADERS frame. The translator maps :authority to Host and separately copies the literal host header, producing an HttpRequest object containing two Host headers with attacker-controlled differing values.
NVD description
Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, 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 in a single HEADERS frame. The translator maps `:authority` to `Host` and separately copies the literal `host` header, producing an `HttpRequest` object containing two `Host` headers with attacker-controlled differing values. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.
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