io.netty/netty-codec-haproxy: Netty codec-haproxy: Denial of Service via crafted PROXY protocol v2 message

A flaw was found in Netty's codec-haproxy module. A remote attacker could exploit a vulnerability in the HAProxyMessageDecoder by sending a specially crafted PROXY protocol v2 message. This leads to unbounded buffer accumulation, causing a denial of service DoS due to memory exhaustion...

Linux Distros Unpatched Vulnerability : CVE-2026-59919

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.136.Final and 4.2.16.Final, Netty's HAProxy encoder...

CVE-2026-59919

A flaw was found in the netty-codec-haproxy component, part of the Netty network application framework. This vulnerability allows a remote attacker to perform protocol-level injection attacks by crafting malformed HAProxy protocol frames that contain embedded carriage return CR and line feed LF...

CVE-2026-55851

A flaw was found in Netty's codec-haproxy module. A remote attacker could exploit a vulnerability in the HAProxyMessageDecoder by sending a specially crafted PROXY protocol v2 message. This leads to unbounded buffer accumulation, causing a denial of service DoS due to memory exhaustion...

Linux Distros Unpatched Vulnerability : CVE-2026-55851

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

blaze: Multiple HTTP/1.1 request-smuggling primitives in blaze's Java wire parser

Summary Five independent HTTP/1.1 conformance laxities in blaze's hand-written Java parser http/src/main/java/org/http4s/blaze/http/parser/ cause request-boundary disagreement with a stricter intermediary. All are reachable from a default BlazeServerBuilder with no non-default configuration. Impa...

HAProxy Community Edition 3.0 through 3.3 before 3.3.3 lacks a length check for the NEW_TOKEN format. HAProxy Enterprise and ALOHA are also affected.

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CRLF Injection

Overview Affected versions of this package are vulnerable to CRLF Injection via the encodeV1. An attacker can inject arbitrary CRLF sequences into AFUNIX addresses by supplying specially crafted input, resulting in the creation of multiple PROXY protocol header lines. This can lead to client IP...

ai.spice:spiceai (0.6.0), ch.zzeekk.spark:spark-temporalquery_2.13 (4.0.0) +1312 more potentially affected by CVE-2026-59919 via io.netty:netty-codec-haproxy (>=4.2.0.final, <=4.2.15.final)

io.netty:netty-codec-haproxy MAVEN version =4.2.0.final, =4.2.15.final is affected by a known vulnerability. The following packages have a transitive dependency on io.netty:netty-codec-haproxy and may be impacted: - ai.spice:spiceai 0.6.0 - ch.zzeekk.spark:spark-temporalquery2.13 4.0.0 -...

ac.intave:cloud-protocol (>=0.0.1, <=0.0.11), ai.agentican:agentican-quarkus-deployment (>=0.1.0-alpha.1, <=0.1.0-alpha.4) +10196 more potentially affected by CVE-2026-59919 via io.netty:netty-codec-haproxy (>=4.1.21.final, <=4.1.135.final)

io.netty:netty-codec-haproxy MAVEN version =4.1.21.final, =0.0.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.3, =0.1.0, =0.1.0, =def544ccef5f753238ecc4adfc2eaa7d2fc36d53-0.0.91,...

ac.intave:cloud-protocol (>=0.0.1, <=0.0.11), ai.agentican:agentican-quarkus-deployment (>=0.1.0-alpha.1, <=0.1.0-alpha.4) +10196 more potentially affected by CVE-2026-59919 via io.netty:netty-codec-haproxy (>=4.1.21.final, <=4.1.135.final)

io.netty:netty-codec-haproxy MAVEN version =4.1.21.final, =0.0.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.3, =0.1.0, =0.1.0, =def544ccef5f753238ecc4adfc2eaa7d2fc36d53-0.0.91,...

Netty: HAProxy V1 Protocol CRLF Injection via AF_UNIX Address

Security Vulnerability Report: HAProxy V1 Protocol CRLF Injection via AFUNIX Address in Netty 1. Vulnerability Summary | Field | Value | |-------|-------| | Product | Netty | | Version | 4.2.12.Final and all prior versions with codec-haproxy | | Component |...

GHSA-WH89-7897-X99H Netty: HAProxy V1 Protocol CRLF Injection via AF_UNIX Address

Security Vulnerability Report: HAProxy V1 Protocol CRLF Injection via AFUNIX Address in Netty 1. Vulnerability Summary | Field | Value | |-------|-------| | Product | Netty | | Version | 4.2.12.Final and all prior versions with codec-haproxy | | Component |...

ai.spice:spiceai (0.6.0), ch.zzeekk.spark:spark-temporalquery_2.13 (4.0.0) +1312 more potentially affected by CVE-2026-59919 via io.netty:netty-codec-haproxy (>=4.2.0.final, <=4.2.15.final)

io.netty:netty-codec-haproxy MAVEN version =4.2.0.final, =4.2.15.final is affected by a known vulnerability. The following packages have a transitive dependency on io.netty:netty-codec-haproxy and may be impacted: - ai.spice:spiceai 0.6.0 - ch.zzeekk.spark:spark-temporalquery2.13 4.0.0 -...

ac.intave:cloud-protocol (>=0.0.1, <=0.0.11), ai.agentican:agentican-quarkus-deployment (>=0.1.0-alpha.1, <=0.1.0-alpha.4) +10196 more potentially affected by CVE-2026-59919 via io.netty:netty-codec-haproxy (>=4.1.21.final, <=4.1.135.final)

io.netty:netty-codec-haproxy MAVEN version =4.1.21.final, =0.0.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.3, =0.1.0, =0.1.0, =def544ccef5f753238ecc4adfc2eaa7d2fc36d53-0.0.91,...

ai.spice:spiceai (0.6.0), ch.zzeekk.spark:spark-temporalquery_2.13 (4.0.0) +1312 more potentially affected by CVE-2026-55851 via io.netty:netty-codec-haproxy (>=4.2.0.final, <=4.2.15.final)

io.netty:netty-codec-haproxy MAVEN version =4.2.0.final, =4.2.15.final is affected by a known vulnerability. The following packages have a transitive dependency on io.netty:netty-codec-haproxy and may be impacted: - ai.spice:spiceai 0.6.0 - ch.zzeekk.spark:spark-temporalquery2.13 4.0.0 -...

ac.intave:cloud-protocol (>=0.0.1, <=0.0.11), ai.agentican:agentican-quarkus-deployment (>=0.1.0-alpha.1, <=0.1.0-alpha.4) +10196 more potentially affected by CVE-2026-55851 via io.netty:netty-codec-haproxy (>=4.1.21.final, <=4.1.135.final)

io.netty:netty-codec-haproxy MAVEN version =4.1.21.final, =0.0.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.1, =0.1.0-alpha.3, =0.1.0, =0.1.0, =def544ccef5f753238ecc4adfc2eaa7d2fc36d53-0.0.91,...

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...

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...