CVE-2026-34982

DOCUMENTATION: A flaw was found in Vim. A modeline is used to set specific editor options directly from a text file. However, the complete, guitabtooltip, printheader options and the mapset function lack proper security checks, allowing an attacker to bypass restrictions and cause arbitrary OS command execution. 

            STATEMENT: To exploit this vulnerability, an attacker needs to convince a user to open a specially crafted file. The arbitrary OS command execution is restricted to the privileges of the user running Vim, limiting the potential of a full system compromise.

            MITIGATION: To mitigate this issue, disable the modeline support by adding the following command to the Vim configuration file:

set nomodeline