CVE-2026-59858 – Vim: Arbitrary Code Execution via C Omni-Completion

CVE ID :CVE-2026-59858

Published : July 9, 2026, 11:17 p.m. | 31 minutes ago

Description :Vim is an open source, command line text editor. Prior to 9.2.0735, the C omni-completion script in runtime/autoload/ccomplete.vim interpolates the typeref: or typename: extension field of a tags entry, without escaping, into a :vimgrep pattern that is run through :execute. Because :vimgrep honors the bar as a command separator, a crafted tag field can close the search pattern and append an arbitrary Ex command; opening a hostile .c file whose project tags file contains such an entry and invoking C omni-completion runs that command as the editing user. This issue is fixed in version 9.2.0735.

Severity: 8.4 | HIGH

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