CVE-2026-22689 Mailpit is vulnerable to Cross-Site WebSocket Hijacking (CSWSH) allowing unauthenticated access to emails

Mailpit is an email testing tool and API for developers. Prior to version 1.28.2, the Mailpit WebSocket server is configured to accept connections from any origin. This lack of Origin header validation introduces a Cross-Site WebSocket Hijacking CSWSH vulnerability. An attacker can host a malicio...

mail/mailpit -- Cross-Site WebSocket Hijacking

Mailpit author reports: The Mailpit WebSocket server is configured to accept connections from any origin. This lack of Origin header validation introduces a Cross-Site WebSocket Hijacking CSWSH vulnerability. An attacker can host a malicious website that, when visited by a developer running Mailp...

CVE-2025-55300

Komari is a lightweight, self-hosted server monitoring tool designed to provide a simple and efficient solution for monitoring server performance. Prior to 1.0.4-fix1, WebSocket upgrader has disabled origin checking, enabling Cross-Site WebSocket Hijacking CSWSH attacks against authenticated user...

CVE-2025-55300

Komari is a lightweight, self-hosted server monitoring tool designed to provide a simple and efficient solution for monitoring server performance. Prior to 1.0.4-fix1, WebSocket upgrader has disabled origin checking, enabling Cross-Site WebSocket Hijacking CSWSH attacks against authenticated user...

Mattermost access control vulnerability

Mattermost is an open source collaboration platform from US-based Mattermost. Mattermost suffers from a security vulnerability that stems from an inability to properly authenticate the origin of a Websocket connection, allowing an attacker to access the Websocket API...

PT-2023-25327 · Unknown · Mattermost

Name of the Vulnerable Software and Affected Versions: Mattermost affected versions not specified Description: The issue is related to Mattermost failing to properly validate the origin of a websocket connection. This allows a Man-In-The-Middle MITM attacker on Mattermost to access the websocket...

PT-2023-10141 · Lukehutch · Gribbit

Name of the Vulnerable Software and Affected Versions: lukehutch Gribbit affected versions not specified Description: A problematic issue was found in lukehutch Gribbit, affecting the messageReceived function of the file src/gribbit/request/HttpRequestHandler.java. This issue leads to missing...

CVE-2018-14731

An issue was discovered in HMRServer.js in Parcel parcel-bundler. Attackers are able to steal developer's code because the origin of requests is not checked by the WebSocket server, which is used for HMR Hot Module Replacement. Anyone can receive the HMR message sent by the WebSocket server via a...

DEBIAN-CVE-2015-0259

OpenStack Compute Nova before 2014.1.4, 2014.2.x before 2014.2.3, and kilo before kilo-3 does not validate the origin of websocket requests, which allows remote attackers to hijack the authentication of users for access to consoles via a crafted webpage...

CVE-2015-0259

OpenStack Compute Nova before 2014.1.4, 2014.2.x before 2014.2.3, and kilo before kilo-3 does not validate the origin of websocket requests, which allows remote attackers to hijack the authentication of users for access to consoles via a crafted webpage...

UBUNTU-CVE-2015-0259

OpenStack Compute Nova before 2014.1.4, 2014.2.x before 2014.2.3, and kilo before kilo-3 does not validate the origin of websocket requests, which allows remote attackers to hijack the authentication of users for access to consoles via a crafted webpage...

DEBIAN-CVE-2014-3429

IPython Notebook 0.12 through 1.x before 1.2 does not validate the origin of websocket requests, which allows remote attackers to execute arbitrary code by leveraging knowledge of the kernel id and a crafted page...

PYSEC-2014-21

IPython Notebook 0.12 through 1.x before 1.2 does not validate the origin of websocket requests, which allows remote attackers to execute arbitrary code by leveraging knowledge of the kernel id and a crafted page...

CVE-2012-0475

Mozilla Firefox 4.x through 11.0, Thunderbird 5.0 through 11.0, and SeaMonkey before 2.9 do not properly construct the Origin and Sec-WebSocket-Origin HTTP headers, which might allow remote attackers to bypass an IPv6 literal ACL via a cross-site 1 XMLHttpRequest or 2 WebSocket operation involvin...

CVE-2012-0475: Undefined Security Weakness

Mozilla Firefox 4.x through 11.0, Thunderbird 5.0 through 11.0, and SeaMonkey before 2.9 do not properly construct the Origin and Sec-WebSocket-Origin HTTP headers, which might allow remote attackers to bypass an IPv6 literal ACL via a cross-site 1 XMLHttpRequest or 2 WebSocket operation involvin...