Critical Command Execution Vulnerability in Vim Package
Summary
RLSA-2026:11509: Important: vim security update. Affects vim versions < 2:8.0.1763-22.el8_10.3. Fixed in 2:8.0.1763-22.el8_10.3. How to fix ↓
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Background
Vim, short for Vi IMproved, is a highly configurable text editor built to enable efficient text editing. It is widely used in various environments due to its powerful features and extensibility. However, a recent vulnerability has been identified that allows arbitrary command execution through a bypass of the modeline sandbox, posing significant security risks to users.
Vulnerability Detail
The vulnerability, identified as CVE-2026-34982, stems from a flaw in the modeline sandbox of Vim. This flaw allows an attacker to execute arbitrary commands by manipulating modelines, which are special lines in a file that can set editor options. If exploited, this vulnerability could lead to unauthorized access and control over the system running Vim, potentially compromising sensitive data and system integrity.
How To Fix
Minimum fixed version
2:8.0.1763-22.el8_10.3
This is the first release that contains the fix.
sudo dnf update vimTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can disable modelines in Vim by adding the following line to their Vim configuration file (usually located at ~/.vimrc): 'set nomodeline'. This will prevent the execution of any modeline commands until the package can be updated.
Conclusion
The identified vulnerability in the Vim package poses a significant risk due to the potential for arbitrary command execution. Users are strongly advised to update to the latest patched version to safeguard their systems. Temporary workarounds are available, but they do not replace the need for an update.
See every vulnerability recorded for vim →
FAQ
CVE-2026-34982 is a security vulnerability in the Vim text editor that allows arbitrary command execution via a modeline sandbox bypass.
You can check if your Vim installation is affected by using vulnerability monitoring tools like Vulert, which can analyze your manifest file for known vulnerabilities.
Modelines are special lines in a file that allow users to set Vim options automatically when the file is opened. They can be a potential security risk if not properly sandboxed.
If you cannot update Vim immediately, consider disabling modelines as a temporary workaround to mitigate the risk of exploitation.
The CVSS score for this vulnerability is 8.2, indicating a high severity level that necessitates prompt attention.
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