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CVE-2026-34083

MEDIUM CVSS 3.1: 6.1 EPSS 0.01%
Updated Apr 06, 2026
Signalk
Parameter Value
CVSS 6.1 (MEDIUM)
Affected Versions before 2.24.0
Fixed In 2.24.0
Type CWE-346 (Origin Validation Error), CWE-601 (Open Redirect)
Vendor Signalk
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Signalk Signal_K_Server
cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:*
2.24.0