Incorrect Remote IP Address Evaluation

Reactor Netty is vulnerable to an Incorrect Remote IP Address Evaluation. The vulnerability is due to improper evaluation of the remote IP address when the HAProxy Protocol is enabled, which may allow an attacker to spoof or manipulate the perceived client IP address under specific configurations...

EUVD-2026-66819

In specific scenarios, Reactor Netty HTTP Server may incorrectly evaluate the remote IP address when HAProxy Protocol is enabled. In order for this to happen, the application must be configured to use HAProxy Protocol. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52...

CVE-2026-47845

In specific scenarios, Reactor Netty HTTP Server may incorrectly evaluate the remote IP address when HAProxy Protocol is enabled. In order for this to happen, the application must be configured to use HAProxy Protocol. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52...

CVE-2026-47845: Authentication Bypass by Spoofing

In specific scenarios, Reactor Netty HTTP Server may incorrectly evaluate the remote IP address when HAProxy Protocol is enabled. In order for this to happen, the application must be configured to use HAProxy Protocol. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52...

CVE-2026-47845 Reactor Netty HTTP Server may incorrectly evaluate proxy addresses

In specific scenarios, Reactor Netty HTTP Server may incorrectly evaluate the remote IP address when HAProxy Protocol is enabled. In order for this to happen, the application must be configured to use HAProxy Protocol. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52...

CVE-2026-47845

Reactor Netty HTTP Server may incorrectly evaluate the remote IP address in specific scenarios when the HAProxy Protocol is enabled, allowing a client to spoof the reported source address. Affected versions are 1.3.0–1.3.6 , 1.1.0–1.2.18 , and 1.0.52 and earlier . The vulnerability is rated CVSS ...

CVE-2026-47845 Reactor Netty HTTP Server may incorrectly evaluate proxy addresses

In specific scenarios, Reactor Netty HTTP Server may incorrectly evaluate the remote IP address when HAProxy Protocol is enabled. In order for this to happen, the application must be configured to use HAProxy Protocol. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52...

PT-2026-82347

Name of the Vulnerable Software and Affected Versions Reactor Netty versions 1.0.0 through 1.0.52 Reactor Netty versions 1.1.0 through 1.2.18 Reactor Netty versions 1.3.0 through 1.3.6 Description When the HAProxy Protocol is enabled, the HTTP Server may incorrectly evaluate the remote IP address...

User Impersonation

Overview Affected versions of this package are vulnerable to User Impersonation in the evaluation of the remote IP address when the HAProxy Protocol is enabled. An attacker can bypass IP-based access controls by sending specially crafted requests. Note: This is only exploitable if the application...

Uncontrolled Resource Consumption (Denial Of Service)

Netty is vulnerable to Uncontrolled Resource Consumption Denial of Service. The vulnerability is due to improper handling of the HAProxy protocol version byte in the HAProxyMessageDecoder, where a signed Java byte is widened to an int without masking, causing a crafted 0xFF version byte to be...

CVE-2026-59919 Netty: HAProxy V1 Protocol CRLF Injection via AF_UNIX Address

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 HAProxyMessageEncoder writes AFUNIX source and destination socket addresses into the HAProxy V1 text protocol without validating them for CRLF...

CVE-2026-59919 Netty: HAProxy V1 Protocol CRLF Injection via AF_UNIX Address

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 HAProxyMessageEncoder writes AFUNIX source and destination socket addresses into the HAProxy V1 text protocol without validating them for CRLF...

CVE-2026-59919

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 HAProxyMessageEncoder writes AFUNIX source and destination socket addresses into the HAProxy V1 text protocol without validating them for CRLF...

CVE-2026-59919

Netty CVE-2026-59919 affects the HAProxy encoder (HAProxyMessageEncoder) in Netty versions prior to 4.1.136.Final and 4.2.16.Final. The encoder writes AF_UNIX source/destination addresses into the HAProxy V1 text protocol without validating for CRLF, allowing an attacker who controls an AF_UNIX a...

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 |...

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...

netty-codec-haproxy: Netty HAProxy PROXY protocol v2 codec: Denial of Service via memory leak from crafted PROXY protocol headers

A flaw was found in the Netty HAProxy PROXY protocol v2 codec. A remote attacker can exploit this vulnerability by sending a specially crafted HAProxy PROXY protocol v2 header with nested PP2TYPESSL type-length-value TLV records. This can lead to a memory leak, causing the underlying cumulation...

netty-codec-haproxy: Netty HAProxy PROXY protocol v2 codec: Denial of Service via memory leak from crafted PROXY protocol headers

A flaw was found in the Netty HAProxy PROXY protocol v2 codec. A remote attacker can exploit this vulnerability by sending a specially crafted HAProxy PROXY protocol v2 header with nested PP2TYPESSL type-length-value TLV records. This can lead to a memory leak, causing the underlying cumulation...

CVE-2026-48059

Netty HAProxy: In Netty’s HAProxy PROXY protocol v2 codec, a memory leak occurs on each connection when a syntactically valid nested PP2_TYPE_SSL TLV (depth ≥ 2) is provided. This affects Netty versions 4.1.135.Final and 4.2.15.Final. The leak happens on the successful parse path: the message is ...

CVE-2026-48059 Netty HAProxy: Unbalanced Reference Count in Nested PP2_TYPE_SSL TLV Parsing Leads to Memory Exhaustion

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, the HAProxy PROXY protocol v2 codec in netty leaks native or heap memory on every connection when a client sends a syntactically valid header containing nest...