CVE-2026-25228
Path Traversal in Signal K Server Allows Arbitrary File Access
Publication date: 2026-02-02
Last updated on: 2026-02-20
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| signalk | signal_k_server | to 2.20.3 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-22 | The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a path traversal issue in the Signal K Server application prior to version 2.20.3. It affects the applicationData API and allows authenticated users on Windows systems to read, write, and list arbitrary files and directories outside the intended directory. The problem arises because the validateAppId() function blocks forward slashes (/) but not backslashes (\), which Windows treats as directory separators. This allows attackers to escape the intended applicationData directory and access other parts of the filesystem.
How can this vulnerability impact me? :
This vulnerability can allow an authenticated user on a Windows system to access, modify, or list files and directories outside the intended applicationData directory. This could lead to unauthorized disclosure of sensitive information, modification of important files, or other unintended actions on the filesystem, potentially compromising the integrity and confidentiality of data on the system.
What immediate steps should I take to mitigate this vulnerability?
Upgrade Signal K Server to version 2.20.3 or later, as this version contains the fix for the path traversal vulnerability. Additionally, restrict authenticated user permissions on Windows systems to limit access to the filesystem and monitor for any unusual file access patterns.