CVE-2026-34083
Description
Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.24.0, SignalK Server contains a code-level vulnerability in its OIDC login and logout handlers where the unvalidated HTTP Host header is used to construct the OAuth2 redirect_uri. Because the redirectUri configuration is silently unset by default, an attacker can spoof the Host header to steal OAuth authorization codes and hijack user sessions in realistic deployments as The OIDC provider will then send the authorization code to whatever domain was injected. This issue has been patched in version 2.24.0.
How to fix
- signalk signal_k_server2.24.0 or later
- signalk-server2.24.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| signalk signal_k_server | v < 2.24.0 | 2.24.0 |
| signalk-servernpm | 2.20.0 ≤ v < 2.24.0 | 2.24.0 |
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Attack Surface Management
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