Code Injection in Vim - #VU133463
Published: June 8, 2026
Vulnerability identifier: #VU133463
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-94
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Vim.org
Affected software:
Vim
Vim
Detailed vulnerability description
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to improper control of code generation in Python omni-completion in runtime/autoload/python3complete.vim and pythoncomplete.vim when reconstructing and executing function and class definitions from a hostile Python buffer during omni-completion. A local user can trick the victim into opening or editing a crafted Python buffer and triggering omni-completion to execute arbitrary code.
Only builds with +python3 or +python are affected, and triggering omni-completion in the hostile buffer is required.
Remediation
Install security update from vendor's website.