CVE-2026-28420 MEDIUM

CVE-2026-28420: Vim has Heap-based Buffer Overflow and OOB Read in :terminal

Vendor Vim
Product vim
Weakness CWE-122
Published February 27, 2026
Last update March 2, 2026
View on NVD All CVEs

CVSS base score

4.4/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

What the vulnerability does

01Description

Vim is an open source, command line text editor. Prior to version 9.2.0076, a heap-based buffer overflow WRITE and an out-of-bounds READ exist in Vim's terminal emulator when processing maximum combining characters from Unicode supplementary planes. Version 9.2.0076 fixes the issue.

Key dates

02Disclosure timeline

February 27, 2026 CVE published
March 2, 2026 Record updated