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Vulnerability record · CVE-2026-34083 · published 2 April 2026

CVE-2026-34083: Signalk signal k server origin validation error vulnerability

Signalk · Signal K Server

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.

6.1 CVSS 3.1 Medium EPSS 0.14% · top 96.9% CWE-346 · Origin validation errorCWE-601 · Open redirect
6.1CVSS 3.1 base score
0.14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
24 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/SignalK/signalk-server/releases/tag/v2.24.0 ProductRelease Notes
https://github.com/SignalK/signalk-server/security/advisories/GHSA-cxj8-ggf2-p57c ExploitVendor Advisory
https://github.com/SignalK/signalk-server/security/advisories/GHSA-cxj8-ggf2-p57c ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-34083), CISA KEV, FIRST EPSS (scores of 2026-10-10). This page is refreshed as NVD updates the record.