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 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-2026-47194 Frappe: Host header poisoning can redirect magic login links to an attacker-controlled domain

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...

EUVD-2026-54158

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...

CVE-2026-47194

CVE-2026-47194 affects Frappe, a full-stack web framework. Before versions 15.108.0 and 16.18.3, the temporary magic login link generation could be influenced by an attacker-controlled Host header, allowing a remote attacker to make emailed login links point to a domain they control and capture t...

CVE-2026-47194 Frappe: Host header poisoning can redirect magic login links to an attacker-controlled domain

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...

PT-2026-68941

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...

PT-2026-68733

Name of the Vulnerable Software and Affected Versions Frappe versions prior to 15.108.0 Frappe versions prior to 16.18.3 Description Temporary magic login link generation can use an attacker-controlled request Host header. This allows a remote attacker to cause emailed login links to point to a...

CVE-2026-47194: Origin Validation Error

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...

PT-2026-68817

Name of the Vulnerable Software and Affected Versions h2 versions prior to 4.4.1 Description The software accepts request header blocks containing multiple Host headers and forwards all of them to the consuming application. When the consumer downgrades the connection from HTTP/2 to HTTP/1.1, the...

CVE-2026-71554: Inconsistent Interpretation of HTTP Requests

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-2026-6790

A flaw was found in Eclipse Jetty. The server does not strictly validate that the request authority host and port matches the Host header provided in HTTP/1, HTTP/2, and HTTP/3 requests. This improper validation can lead to various issues, including incorrect handling of URI constructions for...

CVE-2026-0516

A improper neutralization of HTTP Headers for Scripting Syntax vulnerability in SonicOS could allow a remote attacker to manipulate the Host header and redirect firewall management users to arbitrary web domains...

EUVD-2026-53334

A improper neutralization of HTTP Headers for Scripting Syntax vulnerability in SonicOS could allow a remote attacker to manipulate the Host header and redirect firewall management users to arbitrary web domains...

CVE-2026-0516

A vulnerability in SonicOS involving the improper neutralization of HTTP Headers for Scripting Syntax allows a remote attacker to manipulate the Host header . This could lead to the redirection of firewall management users to arbitrary web domains. While multiple sources confirm the existence of ...

CVE-2026-0516

A improper neutralization of HTTP Headers for Scripting Syntax vulnerability in SonicOS could allow a remote attacker to manipulate the Host header and redirect firewall management users to arbitrary web domains...

CVE-2026-0516

A improper neutralization of HTTP Headers for Scripting Syntax vulnerability in SonicOS could allow a remote attacker to manipulate the Host header and redirect firewall management users to arbitrary web domains...

SonicOS Improper Neutralization of HTTP Headers Vulnerability

A improper neutralization of HTTP Headers for Scripting Syntax vulnerability in SonicOS could allow a remote attacker to manipulate the Host header and redirect firewall management users to arbitrary web domains. CVE: CVE-2026-0516 Last updated: Aug. 11, 2026, 1:23 p.m...

CVE-2026-0516: Improper Neutralization of HTTP Headers for Scripting Syntax

A improper neutralization of HTTP Headers for Scripting Syntax vulnerability in SonicOS could allow a remote attacker to manipulate the Host header and redirect firewall management users to arbitrary web domains...