GHSA-4QHR-G3C6-FCFX Netty XML: Injection / Risky Sink — unconfigured XML factory with active DTD and entity handling

Any caller that can deliver bytes to a Netty channel pipeline containing XmlDecoder can send XML with a DOCTYPE declaration to a parser instantiated with no security configuration — but whether external entities are actually resolved depends on Aalto XML's async parser behavior, making this a...

Netty XML: Injection / Risky Sink — unconfigured XML factory with active DTD and entity handling

Any caller that can deliver bytes to a Netty channel pipeline containing XmlDecoder can send XML with a DOCTYPE declaration to a parser instantiated with no security configuration — but whether external entities are actually resolved depends on Aalto XML's async parser behavior, making this a...

EUVD-2026-47564

Netty: Memory Exhaustion via HTTP/3 Reserved Frame Types...

GHSA-HPCC-26XQ-25FV Netty: Memory Exhaustion via HTTP/3 Reserved Frame Types

Summary Netty's Http3FrameCodec buffers incoming data for HTTP/3 reserved frame types up to the specified payload length without any limits. The payload length is read directly from the wire and trusted without validation. A bad actor can send a reserved frame with a payload length of up to...

EUVD-2026-46998

Netty: Security Control Bypass via CORS Short-Circuit Failure...

GHSA-6CQP-G7GG-8HR5 Netty: Security Control Bypass via CORS Short-Circuit Failure

Summary Netty's CorsHandler provides a shortCircuit configuration designed to reject unauthorized cross-origin requests immediately, acting as a security control before requests reach the application. However, due to a logical operator error in the origin evaluation process, this protection can b...

EUVD-2026-46452

Netty: SpdyHttpDecoder ByteBuf Reference Leak on RSTSTREAM Leads to Native Memory Exhaustion...

Netty: [SpdyHttpDecoder] ByteBuf Reference Leak on RST_STREAM Leads to Native Memory Exhaustion

The SpdyHttpDecoder handler in Netty's SPDY-to-HTTP codec allocates a pooled ByteBuf when processing a client-initiated SYNSTREAM frame with FLAGFIN=0, storing the partially-constructed FullHttpRequest in an internal map messageMap to accumulate subsequent DATA frames. When the remote peer sends ...

GHSA-JPPX-W49H-X2QQ Netty: [SpdyHttpDecoder] ByteBuf Reference Leak on RST_STREAM Leads to Native Memory Exhaustion

The SpdyHttpDecoder handler in Netty's SPDY-to-HTTP codec allocates a pooled ByteBuf when processing a client-initiated SYNSTREAM frame with FLAGFIN=0, storing the partially-constructed FullHttpRequest in an internal map messageMap to accumulate subsequent DATA frames. When the remote peer sends ...

Netty: [codec-haproxy] Signed-Byte Sentinel Collision in HAProxyMessageDecoder Leads to Unbounded Memory Exhaustion

The HAProxyMessageDecoder in netty's codec-haproxy module performs protocol version detection by reading the 13th byte of the inbound stream as a signed Java byte and widening it to int without masking. When an attacker sends a PROXY protocol v2 binary prefix 0D 0A 0D 0A 00 0D 0A 51 55 49 54 0A...

GHSA-Q6CQ-MHR2-JMR5 Netty: [codec-haproxy] Signed-Byte Sentinel Collision in HAProxyMessageDecoder Leads to Unbounded Memory Exhaustion

The HAProxyMessageDecoder in netty's codec-haproxy module performs protocol version detection by reading the 13th byte of the inbound stream as a signed Java byte and widening it to int without masking. When an attacker sends a PROXY protocol v2 binary prefix 0D 0A 0D 0A 00 0D 0A 51 55 49 54 0A...

EUVD-2026-46438

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

Netty SPDY zlib header block continues decoded expansion after maxHeaderSize truncation

Summary Netty SPDY header decoding continues inflating zlib-compressed header blocks after the raw header parser has already exceeded maxHeaderSize and marked the frame truncated. At commit b2d2137c4404af425bf9d5d601a62576f5c06925, a 12,253-byte compressed SPDY header block can declare and inflat...

GHSA-MVH2-CRG5-V77C Netty SPDY zlib header block continues decoded expansion after maxHeaderSize truncation

Summary Netty SPDY header decoding continues inflating zlib-compressed header blocks after the raw header parser has already exceeded maxHeaderSize and marked the frame truncated. At commit b2d2137c4404af425bf9d5d601a62576f5c06925, a 12,253-byte compressed SPDY header block can declare and inflat...

EUVD-2026-46133

Netty SPDY zlib header block continues decoded expansion after maxHeaderSize truncation...

EUVD-2026-46132

Netty SPDY SETTINGS frame count materializes unbounded settings map...

Netty SPDY SETTINGS frame count materializes unbounded settings map

Summary Netty's SPDY SETTINGS decoder accepts a peer-declared SETTINGS entry count up to the 24-bit frame-length limit and materializes every unique setting ID in DefaultSpdySettingsFrame without an implementation-level count cap. A remote SPDY/3.1 peer can send one syntactically valid roughly 2...

GHSA-6JQX-86GH-F27W Netty SPDY SETTINGS frame count materializes unbounded settings map

Summary Netty's SPDY SETTINGS decoder accepts a peer-declared SETTINGS entry count up to the 24-bit frame-length limit and materializes every unique setting ID in DefaultSpdySettingsFrame without an implementation-level count cap. A remote SPDY/3.1 peer can send one syntactically valid roughly 2...

Allocation of Resources Without Limits or Throttling

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 Allocation of Resources Without Limits or Throttling through the processing of SPDY SETTINGS...

SUSE CVE-2026-55851

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...