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.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 08 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 08 Sep 2026 01:15:00 +0000

Type Values Removed Values Added
First Time appeared Knowns-dev
Knowns-dev knowns
Vendors & Products Knowns-dev
Knowns-dev knowns

Mon, 07 Sep 2026 23:15:00 +0000

Type Values Removed Values Added
Description 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.
Title knowns before 0.30.0 Arbitrary Code Execution via LSP Binary
Weaknesses CWE-78
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-08T13:48:56.891Z

Reserved: 2026-09-07T22:18:47.705Z

Link: CVE-2026-86540

cve-icon Vulnrichment

Updated: 2026-09-08T13:48:53.188Z

cve-icon NVD

Status : Deferred

Published: 2026-09-07T23:16:53.723

Modified: 2026-09-08T19:56:50.950

Link: CVE-2026-86540

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-08T01:00:11Z

Weaknesses