CVE-2026-47736

A flaw was found in Puma, a Ruby/Rack web server. When PROXY protocol v1 support is enabled, a remote attacker can continuously send data without proper termination. This causes the server to consume an increasing amount of memory and CPU resources, leading to a Denial of Service DoS where the...

CVE-2026-47737

A flaw was found in Puma, a Ruby/Rack web server. When setremoteaddress proxyprotocol: :v1 is enabled and persistent connections are used, Puma incorrectly re-parses PROXY protocol headers after each keep-alive request on the same connection. This allows a remote attacker to inject a second PROXY...

CVE-2026-47736

Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, when PROXY protocol v1 support is enabled, Puma reads incoming bytes into an internal buffer while waiting for CRLF to determine whether a PROXY v1 line is present, allowing an attacker that continuously sends...

CVE-2026-47737

Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, Puma is vulnerable to source IP spoofing when setremoteaddress proxyprotocol: :v1 is enabled and persistent connections are used because Puma incorrectly re-parses PROXY protocol headers after each keep-alive...

CVE-2026-47736 Puma PROXY Protocol v1 Parser Allows Remote Memory Exhaustion

Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, when PROXY protocol v1 support is enabled, Puma reads incoming bytes into an internal buffer while waiting for CRLF to determine whether a PROXY v1 line is present, allowing an attacker that continuously sends...

CVE-2026-47736

Summary: CVE-2026-47736 affects the Puma Ruby/Rack web server when PROXY protocol v1 is enabled. In affected releases (5.5.0 up to 7.2.1 and 8.0.2), Puma reads incoming bytes into an internal buffer while waiting for CRLF to detect a PROXY v1 line, allowing an attacker to send data without CRLF a...

CVE-2026-47737

CVE-2026-47737 affects the Puma Ruby/Rack web server. From 5.5.0 up to 7.2.1 and 8.0.2, it is vulnerable to source IP spoofing when set_remote_address proxy_protocol: :v1 is enabled and persistent connections are used. Puma re-parses PROXY protocol headers after each keep-alive on the same connec...

CVE-2026-47737 Puma PROXY Protocol v1 Accepts Repeated Protocol Headers on Persistent Connections

Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, Puma is vulnerable to source IP spoofing when setremoteaddress proxyprotocol: :v1 is enabled and persistent connections are used because Puma incorrectly re-parses PROXY protocol headers after each keep-alive...

Linux Distros Unpatched Vulnerability : CVE-2026-57216

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a...

CVE-2026-55233

OpenResty is a high performance web platform. From 1.29.2.1 to before 1.29.2.5, an out-of-bounds write vulnerability exists in the upstream PROXY protocol v2 implementation. When OpenResty is configured to send PROXY protocol version 2 headers to upstream servers, constructing the header in the...

CVE-2026-55233

OpenResty vulnerable versions: 1.29.2.1–1.29.2.4. A PROXY protocol v2 header construction in the stream patch can cause an out-of-bounds write, crashing the worker and causing a denial of service. This affects only configurations that enable PROXY protocol v2 for upstream connections. The issue i...

CVE-2026-55233 OpenResty: Buffer overflow when writing PROXY protocol v2 header to upstream

OpenResty is a high performance web platform. From 1.29.2.1 to before 1.29.2.5, an out-of-bounds write vulnerability exists in the upstream PROXY protocol v2 implementation. When OpenResty is configured to send PROXY protocol version 2 headers to upstream servers, constructing the header in the...

PT-2026-57280

Name of the Vulnerable Software and Affected Versions OpenResty versions 1.29.2.1 through 1.29.2.4 Description An out-of-bounds write occurs in the upstream PROXY protocol v2 implementation. When the platform is configured to send PROXY protocol version 2 headers to upstream servers, the process ...

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-2026-47692

A flaw was found in Envoy. The PROXY Protocol v2 header generator can emit data beyond the maximum allowed length, leading to a mismatch between the actual bytes sent and the length specified in the header. An attacker on an adjacent network could exploit this to smuggle bytes into upstream...

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...

BIT-ENVOY-2026-47692 Envoy: PROXY Protocol v2 header generator emits "skipped" TLVs, causing 65 KB attacker-controlled spillover into the upstream application stream

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, PROXY Protocol v2 header generator emits TLVs beyond the maximum length of 65535 bytes, causing a mismatch between bytes written and the length field in th...

CVE-2026-47692

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, PROXY Protocol v2 header generator emits TLVs beyond the maximum length of 65535 bytes, causing a mismatch between bytes written and the length field in th...

CVE-2026-47692 Envoy: PROXY Protocol v2 header generator emits "skipped" TLVs, causing 65 KB attacker-controlled spillover into the upstream application stream

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, PROXY Protocol v2 header generator emits TLVs beyond the maximum length of 65535 bytes, causing a mismatch between bytes written and the length field in th...

EUVD-2026-39827

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, PROXY Protocol v2 header generator emits TLVs beyond the maximum length of 65535 bytes, causing a mismatch between bytes written and the length field in th...