A serious flaw in the Vim text editor lets an attacker run any OS command they want just by getting a user to open a file that has been set up in a certain way This article explores affects versions vim. . The bug, which was made public on March 30, 2026, affects all versions of Vim before 9.2.0272 and has been given the CWE-78 (Improper Neutralization of Special Elements used in an OS Command OS Command Injection) code.

There is no CVE number yet. A bug chain involving two different Vim parts, the tabpanel option and the autocmd_add() function, is what caused the vulnerability. An attacker only needs to: Make a bad text file that has a weaponized modeline in it. Send the file to the target as an email attachment, through a shared repository, or as a download.

Wait for the victim to use Vim to open the file.

When the modeline is opened, the malicious expression is added, and the deferred autocommand lets the sandbox be bypassed. Hung Nguyen found the vulnerability chain and sent the Vim project a detailed root cause analysis, steps to reproduce the issue, and suggestions for how to fix it. In vulnerability management and patch compliance tools, security teams should mark Vim versions older than 9.2.0272.

When distribution maintainers update their repositories, administrators who manage shared Linux environments should think about using system package managers (apt, yum, dnf, pacman) to install the patch. If you can't upgrade right away, you can turn off modelines completely by adding set nomodeline to /etc/vim/vimrc or ~/.vimrc. Chrisbra, who is in charge of Vim, wrote the advisory.

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