knowns-dev knowns up to 0.29.x Configuration File knowns/config.json settings.lsp.languages input validation

Summaryinfo

A vulnerability was found in knowns-dev knowns up to 0.29.x. It has been classified as problematic. The affected element is an unknown function of the file knowns/config.json of the component Configuration File Handler. This manipulation of the argument settings.lsp.languages causes input validation. This vulnerability is handled as CVE-2026-86540. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic was found in knowns-dev knowns up to 0.29.x. Affected by this vulnerability is an unknown code block of the file knowns/config.json of the component Configuration File Handler. The manipulation of the argument settings.lsp.languages with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

knowns versions before 0.30.0 fail to validate the settings.lsp.languages binary field in project configuration files, allowing attackers to execute arbitrary binaries by crafting a malicious .knowns/config.json file. When a repository with a crafted configuration is opened, the unvalidated binary path is executed twice under the user's account without any verification.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-86540 since 09/08/2026. The exploitation appears to be easy. Attacking locally is a requirement. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

By approaching the search of inurl:knowns/config.json it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 0.30.0 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• knowns-dev

Name

• knowns

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29

Website

• Product: https://github.com/knowns-dev/knowns/

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