CVE-2026-23486 Scanner

Blinko is a self-hosted personal note software, commonly used by individuals and organizations to manage and organize personal notes and information efficiently. It is typically utilized for its ease of use and flexibility, allowing users to manage a wide range of information types and formats. This software can be deployed on personal servers, providing users with complete control over their data. Developed by BlinkoSpace, it is designed to be easily integrated into personal or organizational workflows. Its user-friendly interface makes it popular for those who need a reliable note management tool. Blinko is valued for its ability to function as a central repository for various types of information.

The detected vulnerability in Blinko allows for information disclosure due to a publicly accessible endpoint. This vulnerability can be exploited by remote attackers to gain access to sensitive user information such as usernames, roles, and account creation dates. The issue stems from inadequate access controls on a particular API endpoint, permitting unauthorized parties to retrieve this data. Exploitation does not require special privileges, making it relatively easy for attackers to exploit. Properly abused, the vulnerability could lead to significant privacy and security concerns. Timely detection and remediation are vital to safeguarding sensitive user information.

Technical details about the vulnerability indicate it is related to the '/api/v1/user/public-user-list' endpoint. This endpoint inadvertently exposes user data by returning information in JSON format containing usernames and roles among other attributes. The issue occurs because the endpoint does not enforce appropriate access restrictions, allowing anyone to retrieve data without authentication or authorization. The vulnerable parameter is the API path that returns user information when accessed. Attackers can exploit this by sending GET requests to the endpoint. This vulnerability has created a loophole that could lead to potentially severe security breaches if left unaddressed.

When exploited, this vulnerability can have serious impacts, including the potential for privacy violations. Attackers can leverage accessed user information for targeted phishing attacks or social engineering schemes. Disclosed user roles could help attackers target specific individuals based on their role within an organization, increasing the attack's potential efficacy. There is also a risk of identity theft if attackers piece together information from different sources. Systematic exploitation could result in broader data leaks, leading to reputational damage and loss of users' trust. Moreover, unauthorized access to user data could have legal implications, particularly regarding data protection regulations.

REFERENCES

• https://github.com/blinkospace/blinko/security/advisories/GHSA-446p-2xf5-frxf
• https://github.com/blinkospace/blinko
• https://nvd.nist.gov/vuln/detail/CVE-2026-23486