CVE-2026-72574: Improper Neutralization of HTTP Headers for Scripting Syntax

A host header injection vulnerability in picocms/Pico through 2.1.4 allows an unauthenticated remote attacker to control the origin of JavaScript and CSS assets loaded by the default theme. When baseurl is unset the default, Pico::getBaseUrl in lib/Pico.php builds the base URL from unvalidated...

PT-2026-69458

Name of the Vulnerable Software and Affected Versions picocms/Pico versions prior to 2.1.5 Description A host header injection issue allows an unauthenticated remote attacker to control the origin of JavaScript and CSS assets loaded by the default theme. When the base url is unset, the getBaseUrl...

PT-2026-76463

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...

MGASA-2026-0327 Updated python-starlette package fixes security vulnerabilities

The updated package fixes security vulnerabilities: Proxy-Authorization header kept across hosts. CVE-2024-28849 Starlette vulnerable to On^2 DoS via Range header merging in starlette.responses.FileResponse. CVE-2025-62727 Security restriction bypass via malformed HTTP Host header. CVE-2026-48710...

Updated python-starlette package fixes security vulnerabilities

The updated package fixes security vulnerabilities: Proxy-Authorization header kept across hosts. CVE-2024-28849 Starlette vulnerable to On^2 DoS via Range header merging in starlette.responses.FileResponse. CVE-2025-62727 Security restriction bypass via malformed HTTP Host header. CVE-2026-48710...

Exploit for CVE-2026-71554

CVE-2026-71554 - h2 Duplicate Host Header Request Smuggling Pr...

JLSEC-2026-1207 Using libcurl, when a custom `Host:` header is first set for an HTTP request and a second request...

Using libcurl, when a custom Host: header is first set for an HTTP request and a second request is subsequently done using the same easy handle but without the custom Host: header set, the second request would use stale information and pass on cookies meant for the first host in the second reques...

MAL-2026-13626 Malicious code in @mrbenty8jf1p9y5/oidc-bind-canary (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector 1a9ed4acf296e53ad5955f759a0f0692d641781b1bd4e67ada1c116216f96fc3 The package's postinstall lifecycle script issues an HTTPS request from the installer's machine to a Cloudflare tunnel at...

SUSE 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...

poc-h2-duplicate-host

PoC: h2 Duplicate Host Header Request Smuggling Prim...

Security Bulletin: IBM Cloud Pak for Data System (CPDS 1x) is affected by multiple vulnerabilities due to Eclipse Jetty

Summary Eclipse Jetty is used by IBM Cloud Pak for Data System 1x to provide web application server functionality. CVE-2026-10051 affects Jetty's HTTP/1.1 request handling when trailers are retained across multiple requests on the same connection, potentially exposing sensitive information from...

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...

CVE-2026-47194

Frappe is a full-stack web application framework. Prior to 15.108.0 and 16.18.3, temporary magic login link generation can use an attacker-controlled request Host header, allowing a remote attacker to cause emailed login links to point to an attacker-controlled domain and capture the login token...

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...

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...

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 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 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...