CVE-2026-54478 DNS Cookie bypass when combined with proxy-protocol use

In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-protocol-port' interface with 'answer-cookie: yes', the RFC 9018 server-cookie SipHash is computed over the proxy's wire address instead of the PROXYv2-declared client. One server cookie obtained through a...

CVE-2026-65602

Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references the allowlist was only enforced for HTTP serversTransport references. A low-privileged Kubernetes user in a namespace not listed in...

PT-2026-63360

Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references the allowlist was only enforced for HTTP serversTransport references. A low-privileged Kubernetes user in a namespace not listed in...

PT-2026-63471

Name of the Vulnerable Software and Affected Versions MongoDB affected versions not specified Description When PROXY protocol v2 is used on the Unix domain socket path, roles derived from X.509 client certificates may not be validated against the configured tlsCATrusts allow-list. This failure in...

PT-2026-63386

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions 1.18.0 through 1.25.1 Description When the software listens on a 'proxy-protocol-port' interface with answer-cookie: yes, the RFC 9018 server-cookie SipHash is computed using the proxy's wire address rather than the...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the HAProxyMessageDecoder. An attacker can cause unbounded memory allocation by sending a specially crafted PROXY protocol v2 binary prefix with a version byte of 0xFF, which...

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...

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...

PT-2026-62225

Name of the Vulnerable Software and Affected Versions Netty versions 4.1.0.Final through 4.1.134 Netty versions 4.2.0.Final through 4.2.15 Description The HAProxyMessageDecoder in the codec-haproxy module performs protocol version detection by reading the 13th byte as a signed Java byte and...

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-2026-62309

CoreDNS is a DNS server written in Go. Prior to 1.14.4, a single 28-byte UDP datagram can crash the CoreDNS process when the proxyproto plugin is enabled because plugin/pkg/proxyproto/proxyproto.go PacketConn.ReadFrom handles a PROXY v2 header with non-UDP transport such as family byte 0x11,...

CVE-2026-62309

CoreDNS (Go) vulnerability CVE-2026-62309 affects the proxyproto plugin. A crafted PROXY v2 header with a non-UDP transport (family 0x11) can cause a crash via PacketConn.ReadFrom, where a nil readFrom result is reinterpreted after a failed parse and addr.String() is logged before crash recovery....

CVE-2026-62309 CoreDNS: proxyproto plugin panics on PPv2 datagram with non-UDP transport — single 28-byte packet remote DoS

CoreDNS is a DNS server written in Go. Prior to 1.14.4, a single 28-byte UDP datagram can crash the CoreDNS process when the proxyproto plugin is enabled because plugin/pkg/proxyproto/proxyproto.go PacketConn.ReadFrom handles a PROXY v2 header with non-UDP transport such as family byte 0x11,...

CVE-2026-62309 CoreDNS: proxyproto plugin panics on PPv2 datagram with non-UDP transport — single 28-byte packet remote DoS

CoreDNS is a DNS server written in Go. Prior to 1.14.4, a single 28-byte UDP datagram can crash the CoreDNS process when the proxyproto plugin is enabled because plugin/pkg/proxyproto/proxyproto.go PacketConn.ReadFrom handles a PROXY v2 header with non-UDP transport such as family byte 0x11,...

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...

DEBIAN-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-2026-47737

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 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...

DEBIAN-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...