EUVD-2026-228808

fkie_cve-2021-4236

Web Sockets do not execute any AuthenticateMethod methods which may be set, leading to a nil pointer dereference if the returned UserData pointer is assumed to be non-nil, or authentication bypass. This issue only affects WebSockets with an AuthenticateMethod hook. Request handlers that do not explicitly use WebSockets are not vulnerable.

GHSA-5gjg-jgh4-gppm — Websocket requests did not call AuthenticateMethod

Affected: Go: github.com/ecnepsnai/web

### Impact

Depending on implementation, a denial-of-service or privilege escalation vulnerability may occur in software that uses the `github.com/ecnepsnai/web` package with Web Sockets that have an AuthenticateMethod.

The `AuthenticateMethod` is not called, and `UserData` will be nil in request methods. Attempts to read the `UserData` may result in a panic.

This issue only affects web sockets where an `AuthenticateMethod` is supplied to the handle options. Users who do not use web sockets, or users who do not require authentication are not at risk.

#### Example

In the example below, one would expect that the `AuthenticateMethod` function would be called for each request to `/example`

```go handleOptions := web.HandleOptions{ AuthenticateMethod: func(request *http.Request) interface{} { // Assume there is logic here to check for an active sessions, look at cookies or headers, etc... var session Session{} // Example

return session }, }

server.Socket("/example", handle, handleOptions) ```

However, the method is not called, and therefor the `UserData` parameter of the request object in the handle will be nil, when it would have been expected to be the `session` object we returned.

### Patches

Release v1.5.2 fixes this vulnerability. The authenticate method is now called for websocket requests.

All users of the web package should update to v1.5.2 or later.

### Workarounds

You may work around this issue by making the authenticate method a named function, the…

Most recent entries from all

EUVD-2026-228808

fkie_cve-2021-4236

GHSA-5gjg-jgh4-gppm — Websocket requests did not call AuthenticateMethod

gsd-2021-4236