Rocky Linux 9.6 [TuxCare] Security Update: libnghttp2 / libnghttp2-devel / nghttp2 (ALMALINUX9.6:CLSA-2026:1787308423)

The Rocky Linux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1787308423 advisory. - nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content- Length header and body onto...

AlmaLinux 9.6 [TuxCare] Security Update: libnghttp2 / libnghttp2-devel / nghttp2 (ALMALINUX9.6:CLSA-2026:1787308423)

The AlmaLinux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1787308423 advisory. - nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content- Length header and body onto reusab...

AlmaLinux 9.2 [TuxCare] Security Update: libnghttp2 / libnghttp2-devel / nghttp2 (ALMALINUX9.2:CLSA-2026:1787754280)

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1787754280 advisory. - nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content- Length header and body onto reusab...

EulerOS Virtualization 2.12.1 : nghttp2 (EulerOS-SA-2026-3601)

According to the versions of the nghttp2 package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content- Length header and body ont...

EulerOS Virtualization 2.12.0 : nghttp2 (EulerOS-SA-2026-3655)

According to the versions of the nghttp2 package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content- Length header and body ont...

EulerOS 2.0 SP12 : nghttp2 (EulerOS-SA-2026-3286)

According to the versions of the nghttp2 package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content- Length header and body onto reusable...

EulerOS 2.0 SP12 : nghttp2 (EulerOS-SA-2026-3361)

According to the versions of the nghttp2 package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content- Length header and body onto reusable...

Alibaba Cloud Linux 3 : 0271: nghttp2 (ALINUX3-SA-2026:0271)

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2026:0271 advisory. Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities: CVE-2026-58055: nghttp2's nghttpx proxy through...

TencentOS Server 3: nghttp2 (TSSA-2026:0905)

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0905 advisory. Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:...

Unity Linux 20.1070a Security Update: nghttp2 (UTSA-2026-102505)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-102505 advisory. nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content- Length header and body onto reusable keep-alive backend...

CentOS 9 : nghttp2-1.43.0-8.el9

The remote CentOS Linux 9 host has packages installed that are affected by a vulnerability as referenced in the nghttp2-1.43.0-8.el9 build changelog. - nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content- Length header and body onto reusable...

ROS-20260819-73-0068

The vulnerability of the nghttpx component in the nghttp2 library is related to deficiencies in HTTP request processing. Exploiting this vulnerability allows a malicious actor to compromise the confidentiality and integrity of the protected information...

nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests

A flaw in nghttp2's nghttpx proxy allows a remote attacker to perform HTTP request smuggling and cross-client response-queue poisoning. This occurs because the proxy ambiguously forwards HTTP/1.1 Upgrade requests that contain a Content-Length header to reusable keep-alive backend connections...

nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests

A flaw in nghttp2's nghttpx proxy allows a remote attacker to perform HTTP request smuggling and cross-client response-queue poisoning. This occurs because the proxy ambiguously forwards HTTP/1.1 Upgrade requests that contain a Content-Length header to reusable keep-alive backend connections...

JLSEC-2026-1157 nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a...

nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content-Length header and body onto reusable keep-alive backend connections, re-adding the Upgrade and Connection headers while passing Content-Length verbatim. A backend that resolves the resulting...

PT-2026-76194

nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content-Length header and body onto reusable keep-alive backend connections, re-adding the Upgrade and Connection headers while passing Content-Length verbatim. A backend that resolves the resulting...

CVE-2026-58055

A flaw in nghttp2's nghttpx proxy allows a remote attacker to perform HTTP request smuggling and cross-client response-queue poisoning. This occurs because the proxy ambiguously forwards HTTP/1.1 Upgrade requests that contain a Content-Length header to reusable keep-alive backend connections...

nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests

A flaw in nghttp2's nghttpx proxy allows a remote attacker to perform HTTP request smuggling and cross-client response-queue poisoning. This occurs because the proxy ambiguously forwards HTTP/1.1 Upgrade requests that contain a Content-Length header to reusable keep-alive backend connections...

OESA-2026-2979 nghttp2 security update

The framing layer of HTTP/2 is implemented as a form of reusable C library. On top of that, we have implemented HTTP/2 client, server and proxy. We have also developed load test and benchmarking tool for HTTP/2. Security Fixes: nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade...

Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : nghttp2 vulnerability (USN-8495-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8495-1 advisory. It was discovered that the nghttp2 nghttpx proxy incorrectly handled HTTP/1.1 Upgrade requests that included a Content-Length head...