CVE-2026-56816 Netty: Memory Exhaustion via HTTP/3 Reserved Frame Types

Netty is a network application framework for development of protocol servers and clients. Prior to 4.2.16.Final, Netty's Http3FrameCodec buffers incoming data for HTTP/3 reserved frame types up to the wire-specified payload length without limits; decodeFrame trusts payLoadLength, allowing an...

CVE-2026-56816

Netty is a network application framework for development of protocol servers and clients. Prior to 4.2.16.Final, Netty's Http3FrameCodec buffers incoming data for HTTP/3 reserved frame types up to the wire-specified payload length without limits; decodeFrame trusts payLoadLength, allowing an...

CVE-2026-56816 Netty: Memory Exhaustion via HTTP/3 Reserved Frame Types

Netty is a network application framework for development of protocol servers and clients. Prior to 4.2.16.Final, Netty's Http3FrameCodec buffers incoming data for HTTP/3 reserved frame types up to the wire-specified payload length without limits; decodeFrame trusts payLoadLength, allowing an...

Security Bulletin: IBM DevOps Deploy / IBM UrbanCode Deploy (UCD) is susceptible to multiple Netty vulnerabilities (CVE-2026-45673, CVE-2026-45674, CVE-2026-47691)

Summary Netty is used by IBM UrbanCode Deploy UCD for network communication. CVE-2026-45673, CVE-2026-45674, CVE-2026-47691. Vulnerability Details CVEID:CVE-2026-45673 DESCRIPTION: Netty is a network application framework for development of protocol servers and clients. Prior to versions...

Security Bulletin: IBM DevOps Deploy / IBM UrbanCode Deploy (UCD) is affected by an HTTP Request/Response Smuggling Vulnerability in Netty (CVE-2026-50020)

Summary Netty is used by IBM UrbanCode Deploy UCD for network communication. CVE-2026-50020. Vulnerability Details CVEID:CVE-2026-50020 DESCRIPTION: Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, before...

CVE-2026-56746 Netty has a Security Control Bypass via CORS Short-Circuit Failure

Netty is a network application framework for development of protocol servers and clients. Versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, are vulnerable to security control bypass during the origin evaluation process. CorsHandler provides a shortCircuit...

CVE-2026-56746

Netty (versions 4.2.0.Final–4.2.15.Final and 4.1.0.Final–4.1.135.Final) contains a security control bypass in CorsHandler’s origin evaluation due to a logical operator error. An attacker can bypass the short-circuit protection by sending Origin: null, causing unauthorized requests to reach the ba...

CVE-2026-56746 Netty has a Security Control Bypass via CORS Short-Circuit Failure

Netty is a network application framework for development of protocol servers and clients. Versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, are vulnerable to security control bypass during the origin evaluation process. CorsHandler provides a shortCircuit...

CVE-2026-56746

Netty is a network application framework for development of protocol servers and clients. Versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, are vulnerable to security control bypass during the origin evaluation process. CorsHandler provides a shortCircuit...

CVE-2026-56746 Netty has a Security Control Bypass via CORS Short-Circuit Failure

Netty is a network application framework for development of protocol servers and clients. Versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, are vulnerable to security control bypass during the origin evaluation process. CorsHandler provides a shortCircuit...

Security Bulletin: IBM DevOps Deploy / IBM UrbanCode Deploy (UCD) is affected by a Resource Allocation Vulnerability in Netty (CVE-2026-45416)

Summary Netty is used by IBM UrbanCode Deploy UCD for network communication. CVE-2026-45416. Vulnerability Details CVEID:CVE-2026-45416 DESCRIPTION: Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final,...

Security Bulletin: IBM DevOps Deploy / IBM UrbanCode Deploy (UCD) is affected by an HTTP Request/Response Splitting Vulnerability in Netty (CVE-2026-42578)

Summary Netty is used by IBM DevOps Deploy / IBM UrbanCode Deploy UCD for network communication. CVE-2026-42578. Vulnerability Details CVEID:CVE-2026-42578 DESCRIPTION: Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's...

Security Bulletin: IBM DevOps Deploy / IBM UrbanCode Deploy (UCD) is is susceptible to multiple Netty vulnerabilities CVE-2026-42580, CVE-2026-42581, CVE-2026-42584, CVE-2026-42585

Summary Netty is used by IBM DevOps Deploy / IBM UrbanCode Deploy UCD for network communication. CVE-2026-42580, CVE-2026-42581, CVE-2026-42584, CVE-2026-42585. Vulnerability Details CVEID:CVE-2026-42580 DESCRIPTION: Netty is an asynchronous, event-driven network application framework. Prior to...

Security Bulletin: IBM DevOps Deploy / IBM UrbanCode Deploy (UCD) is affected by an Improper Input Validation Vulnerability in Netty (CVE-2026-42579)

Summary Netty is used by IBM DevOps Deploy / IBM UrbanCode Deploy UCD for network communication. CVE-2026-42579. Vulnerability Details CVEID:CVE-2026-42579 DESCRIPTION: Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's DNS codec...

CVE-2026-56745 Netty SpdyHttpDecoder: ByteBuf Reference Leak on RST_STREAM Leads to Native Memory Exhaustion

Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, the SpdyHttpDecoder handler in Netty's SPDY-to-HTTP codec allocates a pooled ByteBuf when processing a client-initiated...

CVE-2026-56745 Netty SpdyHttpDecoder: ByteBuf Reference Leak on RST_STREAM Leads to Native Memory Exhaustion

Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, the SpdyHttpDecoder handler in Netty's SPDY-to-HTTP codec allocates a pooled ByteBuf when processing a client-initiated...

CVE-2026-56745

Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, the SpdyHttpDecoder handler in Netty's SPDY-to-HTTP codec allocates a pooled ByteBuf when processing a client-initiated...

CVE-2026-56745

Netty CVE-2026-56745 affects the SPDY-to-HTTP codec SpdyHttpDecoder. In vulnerable versions (4.2.0.Final–4.2.15.Final and 4.1.0.Final–4.1.135.Final), processing a client SYN_STREAM with FLAG_FIN=0 can cause the decoder to pool a ByteBuf and cache a partially built FullHttpRequest in messageMap. W...

CVE-2026-55851 Netty codec-haproxy: Signed-Byte Sentinel Collision in HAProxyMessageDecoder Leads to Unbounded Memory Exhaustion

Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final up to but not including 4.2.16.Final, and 4.1.0.Final up to but not including 4.1.135, the HAProxyMessageDecoder in Netty's codec-haproxy module performs protocol version detection by...

CVE-2026-55851

CVE-2026-55851 affects Netty (codec-haproxy) where the HAProxyMessageDecoder reads the 13th byte as a signed value and sign-extends to int, causing a PROXY v2 prefix with 0xFF to collide with the decoder’s need-more-data sentinel. This leads to unbounded cumulation and potential memory exhaustion...