CVE-2026-34083: Signal K Server is a server application that runs on a central hub in a boat

Q: How do I fix CVE-2026-34083?

signal k server: upgrade to 2.24.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-34083 being exploited?

CVE-2026-34083 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-34083 affect?

CVE-2026-34083 affects signal k server. Severity is medium (CVSS 6.1). 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 t

Q: How urgent is CVE-2026-34083?

Priority 27/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2026-34083 is a medium-severity flaw (CVSS 6.1) affecting signal k server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 real

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-346, CWE-601
Published	2026-04-02
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: signalk

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-02 17:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

signalk signal k server UPGRADE

Affected: < 2.24.0

Fixed in: 2.24.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy signal-k-server || rpm -q signal-k-server || signal-k-server --version

2. UPGRADE to 2.24.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade signal-k-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade signal-k-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-34083?

signal k server: upgrade to 2.24.0. Exact commands for each OS are on this page.

Is CVE-2026-34083 being exploited?

CVE-2026-34083 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-34083 affect?

CVE-2026-34083 affects signal k server. Severity is medium (CVSS 6.1). 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 t

How urgent is CVE-2026-34083?

Priority 27/100. Public exploit reference

Related CVEs

CVE-2026-39320 HIGH 7.5 UPGRADE Signal K Server is a server application that runs on a central hub in a boat
CVE-2026-33950 CRITICAL 9.4 UPGRADE Signal K Server is a server application that runs on a central hub in a boat
CVE-2026-33951 HIGH 7.5 UPGRADE Signal K Server is a server application that runs on a central hub in a boat
CVE-2026-41893 HIGH 7.5 UPGRADE Signal K Server is a server application that runs on a central hub in a boat
CVE-2026-35038 MEDIUM 6.5 UPGRADE Signal K Server is a server application that runs on a central hub in a boat

References

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