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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.

PUBLISHED Reserved 2026-03-25 | Published 2026-04-02 | Updated 2026-04-02 | Assigner GitHub_M




MEDIUM: 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Problem types

CWE-346: Origin Validation Error

CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

Product status

< 2.24.0
affected

References

github.com/...server/security/advisories/GHSA-cxj8-ggf2-p57c exploit

github.com/...server/security/advisories/GHSA-cxj8-ggf2-p57c

github.com/SignalK/signalk-server/releases/tag/v2.24.0

cve.org (CVE-2026-34083)

nvd.nist.gov (CVE-2026-34083)

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