medium6.6
CVE-2026-25749
Vim is an open source, command line text editor.
Impact
Vim is an open source, command line text editor. Prior to version 9.1.2132, a heap buffer overflow vulnerability exists in Vim's tag file resolution logic when processing the 'helpfile' option. The vulnerability is located in the get_tagfname() function in src/tag.c. When processing help file tags, Vim copies the user-controlled 'helpfile' option value into a fixed-size heap buffer of MAXPATHL + 1 bytes (typically 4097 bytes) using an unsafe STRCPY() operation without any bounds checking. This issue has been patched in version 9.1.2132.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Neovim | Neovim | through 0.11.6 |
| Vim | Vim | before 9.1.2132 |