CVE-2026-25749
MEDIUMVim < 9.1.2132 - Heap-based Buffer Overflow in Tag File Resolution
Title source: llmDescription
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.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/vim/vim/security/advisories/GHSA-5w93-4g67-mm43
Patch x_refsource_misc
https://github.com/vim/vim/commit/0714b15940b245108e6e9d7aa2260dd849a26fa9
Release Notes x_refsource_misc
https://github.com/vim/vim/releases/tag/v9.1.2132
Scores
CVSS v3
6.6
EPSS
0.0021
EPSS Percentile
11.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-122
Status
published
Products (2)
neovim/neovim
< 0.11.6
vim/vim
< 9.1.2132
Published
Feb 06, 2026
Tracked Since
Feb 18, 2026