CVE-2026-34083

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.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/SignalK/signalk-server/releases/tag/v2.24.0	Product Release Notes
https://github.com/SignalK/signalk-server/security/advisories/GHSA-cxj8-ggf2-p57c	Exploit Vendor Advisory
https://github.com/SignalK/signalk-server/security/advisories/GHSA-cxj8-ggf2-p57c	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-02 17:16

Updated : 2026-07-24 21:10

NVD link : CVE-2026-34083

Mitre link : CVE-2026-34083

CVE.ORG link : CVE-2026-34083

JSON object : View

Products Affected

signalk

signal_k_server

CWE

CWE-346

Origin Validation Error

CWE-601

URL Redirection to Untrusted Site ('Open Redirect')

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