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High severity · published Feb 2, 2026
CVE-2026-23515
RCE - Command Injection in Signal K set-system-time plugin
8.8
CVSS
4.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.6% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
signalk-server · SignalK
< 1.5.0 · source: vendor
SK
Signal K Server · Signalk
before 1.5.0 · source: NVD
Affected product
SI
signalk-server
SignalK
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23515
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-23515
Patch
https://github.com/SignalK/set-system-time/commit/75b11eae2de528bf89ede3fb1f7ed057ddbb4d24
Exploit
https://github.com/SignalK/signalk-server/security/advisories/GHSA-p8gp-2w28-mhwg
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