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.

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History

Thu, 02 Apr 2026 20:30:00 +0000

Type Values Removed Values Added
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.
Title signalk-server: OAuth Authorization Code Theft via Unvalidated Host Header in OIDC Flow
Weaknesses CWE-346
CWE-601
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-02T17:39:18.548Z

Reserved: 2026-03-25T16:21:40.869Z

Link: CVE-2026-34083

cve-icon Vulnrichment

Updated: 2026-04-02T17:39:08.718Z

cve-icon NVD

Status : Received

Published: 2026-04-02T17:16:23.403

Modified: 2026-04-02T18:16:28.220

Link: CVE-2026-34083

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses