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CVE-2026-25749

nvd nist
Published: Feb 6, 2026Modified: Jun 17, 2026

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6.6
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H
Exploitability: 1.3 / Impact: 5.2
Source: security-advisories@github.com (Secondary)

Description

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 (2)

Products: Neovim: Neovim · Vim: Vim
Neovim
1 product
Neovim
Vim
1 product
Vim
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Neovim
Up to 0.11.6
Vim
Before 9.1.2132

Related CWEs

CWE-122
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

References (3)

Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Product
Source: security-advisories@github.com
ExploitPatchVendor Advisory

Timeline

No history available yet.