CVE-2026-23482
Path Traversal in Blinko File Server Allows Unauthorized Data Access
Publication date: 2026-03-23
Last updated on: 2026-03-24
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| blinko | blinko | to 1.8.4 (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?
[{'type': 'paragraph', 'content': 'CVE-2026-23482 is a high-severity path traversal vulnerability in the Blinko AI-powered card note-taking project. Before version 1.8.4, the file server endpoint at /api/file/temp/ did not perform proper permission checks or filter path traversal sequences like "../". This allowed unauthorized attackers to craft requests that could read arbitrary files on the server, bypassing intended access restrictions.'}, {'type': 'paragraph', 'content': 'Specifically, the vulnerability arises because the endpoint decodes and extracts file paths from requests without validating or sanitizing them, allowing attackers to access files outside the permitted directory. When scheduled backup tasks are enabled, attackers could read backup files containing all user notes and user tokens, leading to significant data exposure.'}] [1]
How can this vulnerability impact me? :
This vulnerability can have serious impacts including unauthorized disclosure of sensitive data. Attackers exploiting this flaw can read any file on the server, including backup files that contain all user notes and user tokens.
Such unauthorized access can lead to loss of confidentiality, exposure of private user information, and potential compromise of user accounts due to stolen tokens.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
[{'type': 'paragraph', 'content': 'This vulnerability can be detected by monitoring for unauthorized GET requests targeting the vulnerable endpoint /api/file/temp/ that include path traversal sequences such as "../" in the request path.'}, {'type': 'paragraph', 'content': 'A practical detection method is to analyze web server or application logs for suspicious requests attempting to access files outside the intended directory via path traversal.'}, {'type': 'list_item', 'content': 'Use command-line tools like grep to search logs for requests containing "/api/file/temp/" and ".." sequences, for example:'}, {'type': 'list_item', 'content': 'grep -E "/api/file/temp/.*\\.\\./" /path/to/access.log'}, {'type': 'list_item', 'content': 'Use network monitoring tools or intrusion detection systems (IDS) to alert on HTTP GET requests with suspicious path traversal patterns targeting the /api/file/temp/ endpoint.'}] [1]
What immediate steps should I take to mitigate this vulnerability?
The immediate mitigation step is to upgrade Blinko to version 1.8.4 or later, where this vulnerability has been patched.
If upgrading is not immediately possible, restrict access to the /api/file/temp/ endpoint by implementing authentication and authorization controls to prevent unauthorized access.
Additionally, apply network-level controls such as firewall rules or web application firewall (WAF) rules to block requests containing path traversal sequences targeting the vulnerable endpoint.
Review and monitor scheduled backup tasks to ensure sensitive files are not exposed through this vulnerability.