OESA-2026-3310 trafficserver security update

Apache Traffic Server is an OpenSource HTTP / HTTPS / HTTP/2 / QUIC reverse, forward and transparent proxy and cache. Security Fixes: Regular Expression without Anchors vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 10.0.X through 10.1.3, from 9.0.X through...

OESA-2026-3309 trafficserver security update

Apache Traffic Server is an OpenSource HTTP / HTTPS / HTTP/2 / QUIC reverse, forward and transparent proxy and cache. Security Fixes: Regular Expression without Anchors vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 10.0.X through 10.1.3, from 9.0.X through...

PT-2026-76580

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, the libevent evhttp parser in http.c inconsistently handles duplicate Transfer-Encoding headers, comma-separated Transfer-Encoding values, and bare line feeds in chunked framing. evhttp find header can select only the fir...

Linux Distros Unpatched Vulnerability : CVE-2026-71554

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host...

PT-2026-76578

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent processes chunked HTTP trailers in http.c through evhttp read trailer and merges them into request headers. The fix introduces evhttp parse headers impl and a temporary trailer header list. An unauthenticated...

aiohttp < 3.14.2 HTTP Request Smuggling

The version of aiohttp installed on the remote host is prior to 3.14.2. It is, therefore, affected by a request smuggling vulnerability: - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the HTTP parsers were vulnerable to a request smuggling attac...

CVE-2026-71554

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request...

DEBIAN-CVE-2026-71554

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request...

CVE-2026-71324

Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.53, 3.6.24, and 3.7.9, Traefik's default HTTP reverse proxy forwards a plain HTTP/2 or HTTP/3 CONNECT request and its body to an HTTP/1.1 upstream through a shared net/http.Transport. When the upstream answers the CONNE...

UBUNTU-CVE-2026-71554

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request...

h2: Duplicate Host header could facilitate request smuggling

Impact h2 =4.4.0 accepts request header blocks containing more than one Host header, and forwards every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, which is a request smuggling primitive CWE-444...

GHSA-6HR6-W5QG-QMWG h2: Duplicate Host header could facilitate request smuggling

Impact h2 =4.4.0 accepts request header blocks containing more than one Host header, and forwards every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, which is a request smuggling primitive CWE-444...

EUVD-2026-54177

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request...

CVE-2026-71554

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request...

CVE-2026-71554 h2: Duplicate Host header could facilitate request smuggling

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request...

CVE-2026-71554

CVE-2026-71554 affects the Python HTTP/2 stack in the h2 package. Versions up to and including 4.4.0 accept header blocks containing more than one Host header and forward all Host headers to the application. When a client downgrades HTTP/2 to HTTP/1.1, this can yield two Host header lines, enabli...

CVE-2026-71554 h2: Duplicate Host header could facilitate request smuggling

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request...

SUSE CVE-2026-67181

Rouille 0.3.3 through 3.6.2 contains an HTTP request smuggling vulnerability that allows remote attackers to desynchronize HTTP message boundaries by exploiting improper header forwarding in the proxy implementation. The proxy in src/proxy.rs forwards the client's Transfer-Encoding header to...

SUSE CVE-2026-67182

Rouille 0.3.3 through 3.6.2 contains an HTTP request smuggling vulnerability that allows remote attackers to bypass access controls by injecting bare line feed characters 0x0A into client-supplied request header values that are copied verbatim to upstream connections without validation. Attackers...

EulerOS 2.0 SP13 : golang (EulerOS-SA-2026-3017)

According to the versions of the golang packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.CVE-2026-42499 If a trusted template...