Is CVE-2026-34083 actively exploited?

No active exploitation of CVE-2026-34083 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34083 be exploited remotely?

Yes. CVE-2026-34083 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-34083?

CVE-2026-34083 has a CVSS score of 6.1 (MEDIUM).

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MEDIUM

CVE-2026-34083

CWE-346Published: April 2, 2026· Updated: Apr 6, 2026

6.1

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.5th

Official 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.

NVD Source

Technical Analysis

CVE-2026-34083 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.