Summaryinfo

A vulnerability classified as critical has been found in blinkospace blinko up to 1.8.3. The affected element is an unknown function of the component File System Handler. The manipulation of the argument fileName leads to path traversal. This vulnerability is traded as CVE-2026-23484. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in blinkospace blinko up to 1.8.3 and classified as critical. This issue affects some unknown processing of the component File System Handler. The manipulation of the argument fileName with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity, and availability. The summary by CVE is:

Blinko is an AI-powered card note-taking project. In versions from 1.8.3 and prior, the fileName parameter is not filtered, allowing path traversal to write files anywhere on the file system. Moreover, this interface only requires authProcedure (normal user), not superAdminAuthMiddleware. At time of publication, there are no publicly available patches.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-23484 since 01/13/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/28/2026). MITRE ATT&CK project uses the attack technique T1006 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• blinkospace

Name

• blinko

Version

• 1.8.0
• 1.8.1
• 1.8.2
• 1.8.3

Website

• Product: https://github.com/blinkospace/blinko/

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