CVE-2026-93574

CVE-2026-93574 affects Netty's netty-codec-http component, where an incorrect parsing of HTTP/1.1 chunk-size tokens containing post-digit whitespace enables HTTP request smuggling . A remote attacker with no privileges can exploit this over the network to bypass security controls or access unauth...

CVE-2026-93574 Io.netty/netty-codec-http: netty: http request smuggling via post-digit whitespace in chunk-size parsing

A flaw was found in Netty's netty-codec-http component. A remote attacker could exploit this vulnerability by sending a specially crafted HTTP/1.1 chunk-size token that includes post-digit whitespace. This incorrect parsing of the chunk size can lead to HTTP request smuggling. This allows an...

CVE-2026-93573

CVE-2026-93573 is a flaw in Netty's HTTP/1.1 decoder (the netty-codec-http component) that allows a remote, unauthenticated attacker to bypass Transfer-Encoding header validation by splitting the field across multiple headers, with the last field containing a non-final transfer coding such as gzi...

CVE-2026-93573 Io.netty/netty-codec-http: netty split transfer-encoding fields bypass final-chunked validation and enable request smuggling

A flaw was found in Netty's HTTP/1.1 decoder. This vulnerability allows a remote attacker to bypass Transfer-Encoding header validation by splitting the Transfer-Encoding field across multiple headers, with the last field containing a non-final transfer coding like gzip or deflate. This bypass ca...

CVE-2026-93573 Io.netty/netty-codec-http: netty split transfer-encoding fields bypass final-chunked validation and enable request smuggling

A flaw was found in Netty's HTTP/1.1 decoder. This vulnerability allows a remote attacker to bypass Transfer-Encoding header validation by splitting the Transfer-Encoding field across multiple headers, with the last field containing a non-final transfer coding like gzip or deflate. This bypass ca...

CVE-2026-93566 Io.netty/netty-codec-http: netty: http request smuggling due to control characters in the chunk-size line

A flaw was found in Netty. A remote attacker could exploit this by sending a specially crafted HTTP request that includes control characters within the chunk-size line. This bypasses the intended strict validation, allowing the attacker to inject arbitrary HTTP requests. This vulnerability can le...

CVE-2026-93566 Io.netty/netty-codec-http: netty: http request smuggling due to control characters in the chunk-size line

A flaw was found in Netty. A remote attacker could exploit this by sending a specially crafted HTTP request that includes control characters within the chunk-size line. This bypasses the intended strict validation, allowing the attacker to inject arbitrary HTTP requests. This vulnerability can le...

CVE-2026-93566

Netty (io.netty/netty-codec-http) is vulnerable to HTTP request smuggling due to a flaw in chunk-size line validation. The method HttpObjectDecoder#checkChunkExtensions only invokes the strict validator HttpChunkLineValidatingByteProcessor when a chunk extension (;) is present. When no extension ...

CVE-2026-93565

CVE-2026-93565 affects Netty's netty-codec-http module , specifically the RtspMethods.valueOf() method used by RtspDecoder. The root cause is that valueOf() silently strips trailing control bytes (code point ≤ 0x20) before performing a cache lookup against its ten pre-populated method constants. ...

CVE-2026-93565 Io.netty/netty-codec-http: netty rtspdecoder method-token smuggling via trailing control byte

A flaw was found in Netty RtspDecoder. The RtspMethods.valueOf function incorrectly strips trailing control bytes from method tokens in Real-Time Streaming Protocol RTSP requests. A remote attacker can exploit this by sending a specially crafted RTSP request, leading to method-token smuggling. Th...

CVE-2026-93558

Netty netty-codec-http contains a denial-of-service vulnerability in WebSocketServerExtensionHandler , caused by unbounded per-connection queue growth. An unauthenticated remote attacker can trigger this over the network with low complexity, resulting in high availability impact (CVSS 3.1 score 7...

CVE-2026-93558 Io.netty/netty-codec-http: netty: unbounded per-connection queue growth in websocketserverextensionhandler leads to denial of service

A flaw was found in Netty's WebSocketServerExtensionHandler. A remote, unauthenticated attacker can exploit this vulnerability by using HTTP/1.1 pipelining to send requests faster than the application can respond. This leads to an unbounded growth of a per-connection queue, consuming excessive...

CVE-2026-93558 Io.netty/netty-codec-http: netty: unbounded per-connection queue growth in websocketserverextensionhandler leads to denial of service

A flaw was found in Netty's WebSocketServerExtensionHandler. A remote, unauthenticated attacker can exploit this vulnerability by using HTTP/1.1 pipelining to send requests faster than the application can respond. This leads to an unbounded growth of a per-connection queue, consuming excessive...

CVE-2026-93491

Netty 's HttpServerCodec (io.netty/netty-codec-http) is vulnerable to a denial-of-service via unbounded memory consumption. A remote, unauthenticated attacker can pipelining HTTP/1.1 requests on a single connection and withholding reads, causing the methodOverflowQueue to grow without limit and e...

CVE-2026-93491 Io.netty/netty-codec-http: netty: denial of service via unbounded httpservercodec http/1.1 pipeline queue

A flaw was found in Netty's HttpServerCodec. A remote, unauthenticated attacker can exploit this vulnerability by pipelining HTTP/1.1 requests on a single connection and withholding reads. This action causes the methodOverflowQueue to grow without limit, leading to unbounded heap memory consumpti...

CVE-2026-93488 Io.netty/netty-codec-http: netty: denial of service via unbounded concurrent spdy streams

A flaw was found in Netty. SpdySessionHandler accepts an unlimited number of concurrent remote-initiated streams because localConcurrentStreams defaults to Integer.MAXVALUE and the handler provides no API to change it. A remote peer can open a SPDY connection and send a large number of SYNSTREAM...

CVE-2026-93574: Inconsistent Interpretation of HTTP Requests

A flaw was found in Netty's netty-codec-http component. A remote attacker could exploit this vulnerability by sending a specially crafted HTTP/1.1 chunk-size token that includes post-digit whitespace. This incorrect parsing of the chunk size can lead to HTTP request smuggling. This allows an...

Security Bulletin: IBM Watson Discovery Cartridge affected by vulnerability in netty-codec-http-4.1.135.Final.jar

Summary IBM Watson Discovery Cartridge affected by vulnerability in netty-codec-http-4.1.135.Final.jar Vulnerability Details CVEID:CVE-2026-59899 DESCRIPTION: Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, HttpContentEncoder...

io.netty/netty-codec-http: Netty: Memory exhaustion in netty-codec-http (decompression bomb)

A flaw was found in the Netty netty-codec-http component. A remote attacker can send HTTP requests containing highly compressed data. The HTTP decoder in netty-codec-http fails to properly limit the decompression of this content, causing the system to consume excessive memory. This can lead to...

HTTP Request Smuggling

Overview io.netty:netty-codec-http is a network application framework for rapid development of maintainable high performance protocol servers & clients. Affected versions of this package are vulnerable to HTTP Request Smuggling due to incomplete validation of request Transfer-Encoding headers. An...