Envoy-CPU-Exhaustion-Vulnerability-PoC

Envoy CPU Exhaustion Vulnerability PoC This repository contains a proof-of-concept PoC Python script to demonstrate the CPU exhaustion vulnerability in Envoy caused by a flood of CONTINUATION frames. Author: blackmagic 2024 Description Envoy is a cloud-native, open-source edge and service proxy...

Rocky Linux 9.6 [TuxCare] Security Update: libnghttp2 / libnghttp2-devel / nghttp2 (ALMALINUX9.6:CLSA-2026:1778148827)

The Rocky Linux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1778148827 advisory. - Envoy is a cloud-native high-performance edge/middle/service proxy. Envoy's HTTP/2 codec may leak a header map and bookkeeping structures...

SUSE CVE-2026-93567

A flaw was found in Netty's HTTP/2 codec. When converting HTTP/1 CONNECT requests to HTTP/2, the component incorrectly uses the Host header instead of the CONNECT authority-form request-target for the tunnel authority. A remote attacker can exploit this by supplying a different Host header, leadi...

io.netty/netty-codec-http2: HTTP/1 authority-form CONNECT is translated to malformed HTTP/2 CONNECT with Host-controlled :authority

A flaw was found in Netty's HTTP/2 codec. When converting HTTP/1 CONNECT requests to HTTP/2, the component incorrectly uses the Host header instead of the CONNECT authority-form request-target for the tunnel authority. A remote attacker can exploit this by supplying a different Host header, leadi...

Linux Distros Unpatched Vulnerability : CVE-2026-93567

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in Netty's HTTP/2 codec. When converting HTTP/1 CONNECT requests to HTTP/2, the component incorrectly uses the Host header instead of the CONNE...

SUSE CVE-2026-73513

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's optional oghttp2 upstream HTTP/2 codec accepts a response trailer HEADERS frame without ENDSTREAM. Envoy completes and deferred-deletes the ActiveRequest...

DEBIAN-CVE-2026-93567

A flaw was found in Netty's HTTP/2 codec. When converting HTTP/1 CONNECT requests to HTTP/2, the component incorrectly uses the Host header instead of the CONNECT authority-form request-target for the tunnel authority. A remote attacker can exploit this by supplying a different Host header, leadi...

CVE-2026-93567

A flaw was found in Netty's HTTP/2 codec. When converting HTTP/1 CONNECT requests to HTTP/2, the component incorrectly uses the Host header instead of the CONNECT authority-form request-target for the tunnel authority. A remote attacker can exploit this by supplying a different Host header, leadi...

CVE-2026-93567: Improper Input Validation

A flaw was found in Netty's HTTP/2 codec. When converting HTTP/1 CONNECT requests to HTTP/2, the component incorrectly uses the Host header instead of the CONNECT authority-form request-target for the tunnel authority. A remote attacker can exploit this by supplying a different Host header, leadi...

PT-2026-95420

Name of the Vulnerable Software and Affected Versions Netty affected versions not specified Description A flaw exists in the HTTP/2 codec when converting HTTP/1 CONNECT requests to HTTP/2. The component incorrectly utilizes the Host header instead of the CONNECT authority-form request-target to...

PT-2026-29958

Envoy is a cloud-native high-performance edge/middle/service proxy. Envoy’s HTTP/2 codec may leak a header map and bookkeeping structures upon receiving RST STREAM immediately followed by the GOAWAY frames from an upstream server. In nghttp2, cleanup of pending requests due to receipt of the GOAW...

CVE-2024-45807

A flaw was found in Envoy. Affected version of Envoy are using oghttp as the default HTTP/2 codec, and there are potential bugs around stream management in the codec. To resolve this issue, Envoy will switch off the oghttp2 by default. This issue may cause envoy to crash. Mitigation Mitigation fo...

CVE-2024-45807: Always-Incorrect Control Flow Implementation

Envoy is a cloud-native high-performance edge/middle/service proxy. Envoy's 1.31 is using oghttp as the default HTTP/2 codec, and there are potential bugs around stream management in the codec. To resolve this Envoy will switch off the oghttp2 by default. The impact of this issue is that envoy wi...

CVE-2024-45807 oghttp2 crash on OnBeginHeadersForStream in envoy

Envoy is a cloud-native high-performance edge/middle/service proxy. Envoy's 1.31 is using oghttp as the default HTTP/2 codec, and there are potential bugs around stream management in the codec. To resolve this Envoy will switch off the oghttp2 by default. The impact of this issue is that envoy wi...

EulerOS 2.0 SP9 : nghttp2 (EulerOS-SA-2023-3346)

According to the versions of the nghttp2 package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Envoy is a cloud-native high-performance edge/middle/service proxy. Envoy's HTTP/2 codec may leak a header map and bookkeeping structures upon...

EulerOS Virtualization 2.10.1 : nghttp2 (EulerOS-SA-2023-3506)

According to the versions of the nghttp2 package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - Envoy is a cloud-native high-performance edge/middle/service proxy. Envoy's HTTP/2 codec may leak a header map and bookkeeping...

Huawei EulerOS: Security Advisory for nghttp2 (EulerOS-SA-2023-3015)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Amazon Linux 2 : nghttp2 (ALAS-2023-2180)

The version of nghttp2 installed on the remote host is prior to 1.41.0-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2023-2180 advisory. Envoy is a cloud-native high-performance edge/middle/service proxy. Envoy's HTTP/2 codec may leak a header map and bookkeeping...

CVE-2023-35945

Envoy is a cloud-native high-performance edge/middle/service proxy. Envoy’s HTTP/2 codec may leak a header map and bookkeeping structures upon receiving RSTSTREAM immediately followed by the GOAWAY frames from an upstream server. In nghttp2, cleanup of pending requests due to receipt of the GOAWA...

CVE-2023-35945

A flaw was found in Envoy, where a specifically crafted response from an untrusted upstream service can cause a denial of service through memory exhaustion. This issue is caused by Envoy’s HTTP/2 codec, which may leak a header map and bookkeeping structures upon receiving RSTSTREAM immediately,...