CVE-2026-44514

Kubetail has a Cross-Site WebSocket Hijacking issue that allows attacker to read Kubernetes logs from authenticated users in github.com/kubetail-org/kubetail/modules/cli. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/kubetail-org/kubetail/modules/cli before v0.16.0; github.com/kubetail-org/kubetail/modules/dashboard before v0.14.0.

### Summary 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 the user's dashboard and read their Kubernetes logs in real time. This is a Cross-Site WebSocket Hijacking (CSWSH) vulnerability and affects both the desktop deployment (default http://localhost:7500) and cluster deployments (typically behind an Ingress with HTTP basic auth). ### Impact An attacker who can convince an authenticated Kubetail user to visit a page they control can: - Establish a WebSocket connection to the victim's dashboard from the attacker's origin - Stream container logs the victim has access to via the Kubernetes API - Exfiltrate the contents to an attacker-controlled server The attacker gains **read-only** access to logs — no write or destructive operations are exposed. However, container logs frequently contain credentials accidentally written by application code, bearer tokens, internal hostnames, customer PII, and other secrets, so the practical impact of read access can be significant. The desktop deployment is particularly exposed because the dashboard is reachable at a predictable localhost URL, requires no network reachability from the attacker, and the browser will attach ambient credentials to the WebSocket handshake. For cluster deployments fronted by HTTP basic auth, the browser's automatic re-sending of basic-auth credentials on the WebSocket upgrade request enables the same attack against the configured dashboard origin. ### Affected versions | Component | Name | Affected | Patched | | --------------------------------- | ---------------------- | -------- | ---------- | | Kubetail Dashboard docker image | `kubetail-dashboard` | < 0.14.0 | >= 0.14.0 | | Kubetail Helm Chart | `kubetail/kubetail` | < 0.23.0 | >= 0.23.0 | | Kubetail CLI | `kubetail` | < 0.16.0 | >= 0.16.0 | Confirmed in Google Chrome. Microsoft Edge is presumed affected as it shares Chromium's WebSocket implementation, but was not directly tested. **Preconditions for exploitation** 1. The victim has an active authenticated Kubetail session (desktop dashboard running, or browser holding valid credentials for a cluster deployment). 2. The victim visits a web page controlled by the attacker in the same browser. 3. The attacker knows or can guess the dashboard URL (trivial for desktop; cluster deployments require knowing the Ingress hostname). ### Patches Upgrade to: * Kubetail Dashboard 0.14.0 or later * Kubetail Helm Chart 0.23.0 or later * Kubetail CLI 0.16.0 or later ### Workarounds If users cannot upgrade immediately: * **Desktop:** Stop the dashboard (kubetail CLI process) when not actively in use. Avoid visiting untrusted sites in the same browser profile while the dashboard is running. * **Cluster:** Restrict Ingress access to a VPN, bastion, or office network. Add a stronger outer authentication layer (e.g. OAuth proxy) in front of basic auth. Consider browser profile isolation for cluster admins.

Kubetail es un panel de registro en tiempo real para Kubernetes. Antes de la 0.14.0, el panel de Kubetail exponía puntos finales de WebSocket que no validaban adecuadamente el encabezado Origin en la actualización de la conexión. Una página web maliciosa visitada por un usuario con una sesión de Kubetail activa podría abrir un WebSocket al panel del usuario y leer sus registros de Kubernetes en tiempo real. Esto es una vulnerabilidad de Cross-Site WebSocket Hijacking (CSWSH) y afecta tanto a la implementación de escritorio (por defecto http://localhost:7500) como a las implementaciones en clúster (típicamente detrás de un Ingress con autenticación básica HTTP). Esta vulnerabilidad se corrige en la 0.14.0.