CVE-2026-23515
Command Injection in Signal K Server via set-system-time Plugin
Publication date: 2026-02-02
Last updated on: 2026-02-27
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| signalk | signal_k_server | to 1.5.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-78 | The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a command injection flaw in the Signal K Server application (prior to version 1.5.0). It allows authenticated users with write permissions to execute arbitrary shell commands on the server when the set-system-time plugin is enabled. Additionally, if security is disabled, unauthenticated users can also exploit this issue. The root cause is unsafe construction of shell commands when processing navigation.datetime values received via WebSocket delta messages.
How can this vulnerability impact me? :
This vulnerability can have severe impacts including full compromise of the Signal K Server. An attacker could execute arbitrary shell commands, potentially leading to complete control over the server, data theft, data corruption, or denial of service. The CVSS score of 9.9 indicates a critical severity with high impact on confidentiality, integrity, and availability.
What immediate steps should I take to mitigate this vulnerability?
Upgrade the Signal K Server to version 1.5.0 or later, as this version fixes the command injection vulnerability. Additionally, ensure that security is enabled on the Signal K server to prevent unauthenticated exploitation, and restrict write permissions to trusted authenticated users only.