What is the CVSS score of CVE-2026-23515?

CVE-2026-23515 has a CVSS 3.1 base score of 9.9 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 5.0%.

Which versions of Signal K Server are affected by CVE-2026-23515?

A critical command injection vulnerability in Signal K Server (CVE-2026-23515) allows authenticated users to execute arbitrary commands on marine navigation systems.. A patch is available.

Is there a public PoC exploit available for CVE-2026-23515?

Yes, a public proof-of-concept exploit is available for CVE-2026-23515. Prioritise patching immediately. EPSS: 5.0%.

How to fix or mitigate CVE-2026-23515?

Within 24 hours: Identify all Signal K Server instances in your environment and determine which have the set-system-time plugin enabled; isolate affected systems from critical networks if patching cannot be completed immediately. Within 7 days: Apply vendor patch to upgrade Signal K Server to version 1.5.0 or later on all instances; verify patch installation and restart services. Within 30 days: Conduct security audit of Signal K deployments, review access logs for suspicious activity, reset credentials for accounts with write permissions, and implement network segmentation to restrict Signal K server access.

Signal K Server CVE-2026-23515

CRITICAL

OS Command Injection (CWE-78)

2026-02-02 security-advisories@github.com

GHSA-p8gp-2w28-mhwg

Command Injection Signal K Server

9.9

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

9.9 CRITICAL

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:01 vuln.today

PoC Detected

Feb 27, 2026 - 13:46 vuln.today

Public exploit code

Patch released

Feb 27, 2026 - 13:46 nvd

Patch available

CVE Published

Feb 02, 2026 - 23:16 nvd

CRITICAL 9.9

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

3 npm packages depend on @signalk/set-system-time (1 direct, 2 indirect)

Ecosystem-wide dependent count for version 1.5.0.

DescriptionGitHub Advisory

Signal K Server is a server application that runs on a central hub in a boat. Prior to 1.5.0, a command injection vulnerability allows authenticated users with write permissions to execute arbitrary shell commands on the Signal K server when the set-system-time plugin is enabled. Unauthenticated users can also exploit this vulnerability if security is disabled on the Signal K server. This occurs due to unsafe construction of shell commands when processing navigation.datetime values received via WebSocket delta messages. This vulnerability is fixed in 1.5.0.

AnalysisAI

Command injection in Signal K Server (maritime navigation) before 1.5.0 allows authenticated users to execute OS commands. EPSS 4.96% with PoC and patch available.