Vim · Vim · CVE-2026-25749
**Name of the Vulnerable Software and Affected Versions**
Vim versions prior to 9.1.2132
**Description**
Vim, an open source command line text editor, contains a heap buffer overflow in its tag file resolution logic when processing the 'helpfile' option. The issue resides in the `get tagfname()` function within src/tag.c. The `STRCPY()` function is used to copy the user-controlled 'helpfile' option value into a fixed-size heap buffer without sufficient bounds checking, leading to a potential overflow.
**Recommendations**
Update to Vim version 9.1.2132 or later.