OS Command Injection in Vim - CVE-2026-34982
Published: April 7, 2026
Vulnerability identifier: #VU125037
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-34982
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Vim.org
Affected software:
Vim
Vim
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary OS commands.
The vulnerability exists due to improper neutralization of special elements used in an OS command in modeline processing for the complete, guitabtooltip, and printheader options and the mapset() function when opening a crafted file. A remote attacker can deliver a specially crafted file to execute arbitrary OS commands.
User interaction is required to open a crafted file.
How to mitigate CVE-2026-34982
Install security update from vendor's website.