CVE-2026-6339 Missing request origin validation on burn-on-read reveal endpoint

Mattermost versions 11.5.x = 11.5.1, 11.4.x = 11.4.3 fail to validate the X-Requested-With header on the burn-on-read reveal endpoint which allows an authenticated channel member to force the reveal of a burn-on-read message without recipient consent via a crafted Markdown image tag.. Mattermost...

CVE-2026-6339

Mattermost contains a vulnerability (CVE-2026-6339) in versions 11.5.x <= 11.5.1 and 11.4.x

CVE-2026-6339 Missing request origin validation on burn-on-read reveal endpoint

Mattermost versions 11.5.x = 11.5.1, 11.4.x = 11.4.3 fail to validate the X-Requested-With header on the burn-on-read reveal endpoint which allows an authenticated channel member to force the reveal of a burn-on-read message without recipient consent via a crafted Markdown image tag.. Mattermost...

CVE-2026-6339 Missing request origin validation on burn-on-read reveal endpoint

Mattermost versions 11.5.x = 11.5.1, 11.4.x = 11.4.3 fail to validate the X-Requested-With header on the burn-on-read reveal endpoint which allows an authenticated channel member to force the reveal of a burn-on-read message without recipient consent via a crafted Markdown image tag.. Mattermost...

Origin Validation Error

Dozzle is vulnerable to Origin Validation Error. The vulnerability is due to improper origin validation in the WebSocket upgrader, where connections from any origin are accepted and authenticated with the victim's JWT cookie, allowing attackers to hijack authenticated sessions and gain unauthoriz...

CVE-2026-44514

Kubetail is a real-time logging dashboard for Kubernetes. Prior to 0.14.0, Kubetail's dashboard exposes WebSocket endpoints that did not adequately validate the Origin header on connection upgrade. A malicious web page visited by a user with an active Kubetail session could open a WebSocket to th...

CVE-2026-44514 Kubetail: Cross-Site WebSocket Hijacking allows attacker to read Kubernetes logs from authenticated users

Kubetail is a real-time logging dashboard for Kubernetes. Prior to 0.14.0, Kubetail's dashboard exposes WebSocket endpoints that did not adequately validate the Origin header on connection upgrade. A malicious web page visited by a user with an active Kubetail session could open a WebSocket to th...

CVE-2026-42283

DevSpace UI server WebSocket checks pre-6.3.21 allowed cross-origin connections by default, exposing endpoints via ws://127.0.0.1:8090. A malicious site could trigger a cross-origin WebSocket from the user’s browser to access sensitive endpoints such as /api/logs, /api/enter, and /api/command, en...

CVE-2026-42283 DevSpace UI Server WebSocket CheckOrigin does not validate source

DevSpace is a client-only developer tool for cloud-native development with Kubernetes. Prior to 6.3.21, DevSpace's UI server WebSocket accepts connections from all origins by default, and therefore several endpoints are exposed via this WebSocket. When a developer runs the DevSpace UI and at the...

Improper Origin Validation

Jupyter Server is vulnerable to improper origin validation. The vulnerability is due to the use of Python’s re.match for Origin header validation, which allows an attacker to bypass CORS origin restrictions by using a malicious domain that starts with a trusted domain name...

GHSA-5C57-RQJX-35G2 Cline Kanban Server has a Cross-Origin WebSocket Hijacking Vulnerability

Summary The kanban npm package used by the cline CLI starts a WebSocket server on 127.0.0.1:3484 with no Origin header validation. Any website a developer visits can silently connect to the kanban server via WebSocket and: 1. Leak sensitive data in real-time: workspace filesystem paths, task...

CVE-2026-42190

RedwoodSDK is a server-first React framework. From version 1.0.0-beta.50 to before version 1.2.3, server actions in rwsdk apply HTTP method enforcement but no origin validation. A request originating from a different origin that the browser treats as same-site can invoke a server action with the...

CVE-2026-42190 RedwoodSDK: Same-site CSRF in in server actions

RedwoodSDK is a server-first React framework. From version 1.0.0-beta.50 to before version 1.2.3, server actions in rwsdk apply HTTP method enforcement but no origin validation. A request originating from a different origin that the browser treats as same-site can invoke a server action with the...

CVE-2026-42190 RedwoodSDK: Same-site CSRF in in server actions

RedwoodSDK is a server-first React framework. From version 1.0.0-beta.50 to before version 1.2.3, server actions in rwsdk apply HTTP method enforcement but no origin validation. A request originating from a different origin that the browser treats as same-site can invoke a server action with the...

CVE-2026-42190

RedwoodSDK is a server-first React framework. From version 1.0.0-beta.50 to before version 1.2.3, server actions in rwsdk apply HTTP method enforcement but no origin validation. A request originating from a different origin that the browser treats as same-site can invoke a server action with the...

EUVD-2026-28823

RedwoodSDK is a server-first React framework. From version 1.0.0-beta.50 to before version 1.2.3, server actions in rwsdk apply HTTP method enforcement but no origin validation. A request originating from a different origin that the browser treats as same-site can invoke a server action with the...

CVE-2026-42190

RedwoodSDK (rwsdk) server actions from version 1.0.0-beta.50 up to, but not including, 1.2.3, did not validate the Origin header, enabling same-site CSRF with the victim’s session cookie. The issue is fixed in version 1.2.3. Affected component: server actions (serverAction, RSC protocol); impact:...

CVE-2026-42190 RedwoodSDK: Same-site CSRF in in server actions

RedwoodSDK is a server-first React framework. From version 1.0.0-beta.50 to before version 1.2.3, server actions in rwsdk apply HTTP method enforcement but no origin validation. A request originating from a different origin that the browser treats as same-site can invoke a server action with the...

CVE-2026-41886

locize is a localization platform that connects code and i18n setup. Prior to version 4.0.21, the locize client SDK registers a window.addEventListener"message", … handler that dispatches to registered internal handlers editKey, commitKey, commitKeys, isLocizeEnabled, requestInitialize, … without...

CVE-2026-41886

CVE-2026-41886 affects locize client SDK prior to 4.0.21. The issue is missing validation of event.origin in a window.addEventListener("message", …) handler, allowing an attacker-controlled postMessage to trigger internal handlers (editKey, commitKeys, isLocizeEnabled, etc.). Exploitation require...